diff --git a/src/events/interactionCreate/button/approveSubmission.ts b/src/events/interactionCreate/button/approveSubmission.ts
index 57bca51..0417a3d 100644
--- a/src/events/interactionCreate/button/approveSubmission.ts
+++ b/src/events/interactionCreate/button/approveSubmission.ts
@@ -14,7 +14,7 @@ export const customId = 'submissionApproveButton';
 export class ApproveSubmissionButton implements PermanentButtonInteraction {
 	public customId = customId;
 	public async execute(interaction: ButtonInteraction) {
-		if (!interaction.inGuild() || !interaction.channel) return;
+		if (!interaction.inGuild() || !interaction.channel?.isThread()) return;
 
 		const permissions = interaction.member.permissions as PermissionsBitField;
 
@@ -50,16 +50,22 @@ export class ApproveSubmissionButton implements PermanentButtonInteraction {
 			return;
 		}
 
+		await interaction.reply('Başvuru onaylandı.');
+
 		try {
 			await submitter.roles.add(configuration.submission.role);
 		} catch {
-			await interaction.reply({
-				content: 'Başvuru sahibine rol verilemedi.',
-				ephemeral: true,
-			});
+			await interaction.editReply('Başvuru sahibine rol verilemedi.');
 			return;
 		}
 
+		try {
+			await interaction.channel.setLocked(true);
+			await interaction.channel.setArchived(true);
+		} catch {
+			await interaction.followUp('Alt başlık arşivlenemedi.');
+		}
+
 		logger.info(
 			`Approved submission of [${submitter.user.tag}](${submitter.user.id}) by [${interaction.user.tag}](${interaction.user.id})`
 		);
@@ -67,16 +73,7 @@ export class ApproveSubmissionButton implements PermanentButtonInteraction {
 		logger.channel(
 			'submission',
 			interaction.client,
-			`${submitter.user} hesabının başvurusu ${interaction.user} tarafından onaylandı.`
+			`${submitter.user} hesabının başvurusu ${interaction.user} tarafından onaylandı: ${interaction.channel}`
 		);
-
-		try {
-			await interaction.channel.delete();
-		} catch {
-			await interaction.reply({
-				content: 'Başvuru onaylandı fakat alt başlık silinemedi.',
-				ephemeral: true,
-			});
-		}
 	}
 }
diff --git a/src/events/interactionCreate/button/createSubmission.ts b/src/events/interactionCreate/button/createSubmission.ts
index bdb19dd..67021be 100644
--- a/src/events/interactionCreate/button/createSubmission.ts
+++ b/src/events/interactionCreate/button/createSubmission.ts
@@ -3,7 +3,7 @@ import {
 	type ButtonInteraction,
 	type ModalActionRowComponentBuilder as ModalActionRow,
 	ModalBuilder,
-	type TextChannel,
+	TextChannel,
 	TextInputBuilder,
 	TextInputStyle,
 } from 'discord.js';
@@ -17,13 +17,12 @@ export const customId = 'submissionCreateButton';
 export class CreateSubmissionButton implements PermanentButtonInteraction {
 	public customId = customId;
 	public async execute(interaction: ButtonInteraction) {
-		if (!interaction.channel || !interaction.channel.isTextBased()) return;
+		if (!(interaction.channel instanceof TextChannel)) return;
 
-		const channel = interaction.channel as TextChannel;
-		const channelThreads = await channel.threads.fetch();
+		const threadManager = await interaction.channel.threads.fetch();
 
-		const thread = channelThreads.threads.find((thread) =>
-			thread.name.endsWith(interaction.user.id)
+		const thread = threadManager.threads.find(
+			(thread) => thread.name.endsWith(interaction.user.id) && !thread.locked
 		);
 
 		if (thread) {
@@ -52,10 +51,6 @@ export class CreateSubmissionButton implements PermanentButtonInteraction {
 			return;
 		}
 
-		// note: there is a limit of max threads per guild (1000), it'ld better to
-		// check if it's reached but it's quite impossible to reach that limit
-		// so i'll ignore it for now.
-
 		const modal = new ModalBuilder()
 			.setCustomId(modalId)
 			.setTitle('Başvuru Formu');
diff --git a/src/events/interactionCreate/button/denySubmission.ts b/src/events/interactionCreate/button/denySubmission.ts
index 31be503..1de1250 100644
--- a/src/events/interactionCreate/button/denySubmission.ts
+++ b/src/events/interactionCreate/button/denySubmission.ts
@@ -13,7 +13,7 @@ export const customId = 'submissionDenyButton';
 export class DenySubmissionButton implements PermanentButtonInteraction {
 	public customId = customId;
 	public async execute(interaction: ButtonInteraction) {
-		if (!interaction.inGuild() || !interaction.channel) return;
+		if (!interaction.inGuild() || !interaction.channel?.isThread()) return;
 
 		const permissions = interaction.member.permissions as PermissionsBitField;
 
@@ -26,12 +26,19 @@ export class DenySubmissionButton implements PermanentButtonInteraction {
 			messageContent.indexOf('>')
 		);
 
-		let submitter: User | null;
+		let submitter: User | null = null;
 
 		try {
 			submitter = await interaction.client.users.fetch(submitterId);
+		} catch {}
+
+		await interaction.reply('Başvuru reddedildi.');
+
+		try {
+			await interaction.channel.setLocked(true);
+			await interaction.channel.setArchived(true);
 		} catch {
-			submitter = null;
+			await interaction.followUp('Alt başlık arşivlenemedi.');
 		}
 
 		logger.info(
@@ -41,16 +48,7 @@ export class DenySubmissionButton implements PermanentButtonInteraction {
 		logger.channel(
 			'submission',
 			interaction.client,
-			`<@${submitterId}> hesabının başvurusu ${interaction.user} tarafından reddedildi.`
+			`<@${submitterId}> hesabının başvurusu ${interaction.user} tarafından reddedildi: ${interaction.channel}`
 		);
-
-		try {
-			await interaction.channel.delete();
-		} catch {
-			await interaction.reply({
-				content: 'Başvuru reddedildi fakat alt başlık silinemedi.',
-				ephemeral: true,
-			});
-		}
 	}
 }
diff --git a/src/events/interactionCreate/modal/createSubmission.ts b/src/events/interactionCreate/modal/createSubmission.ts
index 09004c1..8cc0f5d 100644
--- a/src/events/interactionCreate/modal/createSubmission.ts
+++ b/src/events/interactionCreate/modal/createSubmission.ts
@@ -5,7 +5,7 @@ import {
 	ChannelType,
 	type MessageActionRowComponentBuilder as MessageActionRow,
 	type ModalSubmitInteraction,
-	type TextChannel,
+	TextChannel,
 	ThreadAutoArchiveDuration,
 } from 'discord.js';
 
@@ -20,11 +20,9 @@ export const customId = 'createSubmissionModal';
 export class CreateSubmissionModal implements ModalInteraction {
 	public customId = customId;
 	public async execute(interaction: ModalSubmitInteraction) {
-		if (!interaction.channel || !interaction.channel.isTextBased()) return;
+		if (!(interaction.channel instanceof TextChannel)) return;
 
-		const channel = interaction.channel as TextChannel;
-
-		const thread = await channel.threads.create({
+		const thread = await interaction.channel.threads.create({
 			name: `${interaction.user.username} #${interaction.user.id}`,
 			autoArchiveDuration: ThreadAutoArchiveDuration.OneWeek,
 			type: ChannelType.PrivateThread,
diff --git a/src/logger.ts b/src/logger.ts
index b33c6b5..a3ac3b2 100644
--- a/src/logger.ts
+++ b/src/logger.ts
@@ -1,4 +1,4 @@
-import type { Client } from 'discord.js';
+import type { Client, MessageCreateOptions } from 'discord.js';
 import { once } from 'events';
 import pino from 'pino';
 import pretty from 'pino-pretty';
@@ -8,7 +8,12 @@ import { name } from '@/package';
 
 type Channel = 'verify' | 'submission';
 type ExtendedLogger = pino.Logger & {
-	channel: (channel: Channel, client: Client, message: string) => Promise<void>;
+	channel: (
+		channel: Channel,
+		client: Client,
+		message: string,
+		options?: MessageCreateOptions
+	) => Promise<void>;
 };
 
 const channels: Record<Channel, string> = {
@@ -36,7 +41,8 @@ async function createLogger() {
 	logger.channel = async (
 		channel: Channel,
 		client: Client,
-		message: string
+		message: string,
+		options?: MessageCreateOptions
 	) => {
 		try {
 			const textChannel = await client.channels.fetch(channels[channel]);
@@ -52,6 +58,7 @@ async function createLogger() {
 			await textChannel.send({
 				content: message,
 				allowedMentions: { parse: [] },
+				...options,
 			});
 		} catch (error) {
 			logger.error(
diff --git a/src/utils/time.ts b/src/utils/time.ts
index 4938df8..9097375 100644
--- a/src/utils/time.ts
+++ b/src/utils/time.ts
@@ -18,3 +18,14 @@ export function timestamp(date: Date, format?: Format): string {
 		format ? ':' + format : ''
 	}>`;
 }
+
+export function ISO8601(date: Date): string {
+	const year = date.getFullYear();
+	const month = String(date.getMonth() + 1).padStart(2, '0');
+	const day = String(date.getDate()).padStart(2, '0');
+	const hours = String(date.getHours()).padStart(2, '0');
+	const minutes = String(date.getMinutes()).padStart(2, '0');
+	const seconds = String(date.getSeconds()).padStart(2, '0');
+
+	return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
+}