Within the last month of the contract you should be fine, but remember it's best to check, if you are not simply giving 30 days' notice, @Cara21, but switching to another company, especially Vodafone or Virgin.
Ring 03451 720088 and ask [9am - 7pm on weekdays, till 6pm Saturday].
Check this information link:
https://community.talktalk.co.uk/t5/Articles/Cancel-your-TalkTalk-service/ta-p/2204737
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 here
How to contact TalkTalk Broadband - TalkTalk Help & Support
