You can't.
You need to phone and speak to the loyalty team to give your notice to leave.
Try phoning 0345 172 0088
Opening Hours can be found here - https://community.talktalk.co.uk/t5/Articles/How-to-contact-TalkTalk-Broadband/ta-p/2230529#
Please remember to mark Solved Posts with Best Answer. Doing so helps other customers and saves TalkTalk's Support Team time by only looking at unsolved topics. Thanks, Steve (a fellow customer).
