If you no longer want to use TalkTalk, you can simply delete the app from your phone.
To actually delete your account, you can go to your Settings > Your Account > Delete Account. Type in your password to confirm deletion.
Otherwise, contact us via email at support@talktalk.app with your @username and the mobile phone number associated with your TalkTalk account and we will delete it at your request.
Allow 24-72 hours for account deletion.