How long ago did you pay?
If your payment has cleared (this is not immediate), then you should turn your router off for at least 30 minutes to start a new session.
https://community.talktalk.co.uk/t5/Articles/Restriction-to-your-services/ta-p/2347709
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).
