Permanently?
If so the easiest way is to change the password and not divulge it.
Otherwise you could try Home safe.
https://community.talktalk.co.uk/t5/Articles/How-to-use-HomeSafe/ta-p/2205196
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).
