If you had posted this in any of the broadband, fibre or full fibre boards, you would have hopefully seen my sticky on this. Never mind, here it is:-
https://community.talktalk.co.uk/t5/Broadband/Weak-Security-warning-on-Apple-iOS-and-Windows-10-or-1...
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