It's integrated with basic ADSL broadband and FTTC, so can't be separated and cancelled. You are not paying extra for it, @AnnJan - it is part of the same copper line to the house.
The only way to get rid of it is to upgrade the whole thing to full fibre, to the premises, data only.
Not cheaper.
Gliwmaeden2, a fellow customer.
From the 29th of March our TalkTalk Community will move to peer-to-peer support and the TalkTalk team will no longer be here to support with queries. Don’t worry we still have plenty of ways to reach out if you need to speak to TalkTalk directly. For more details check out the link in the post at the top of any forum message board.
