If you phoned 03451 720088 at 11am, @Toffi, yes they should have been open [also Live Chat is open now] but you do have to work through various options.
You could try selecting a different number of option if you keep getting cut off - see if it makes any difference! They then might put you through to the right service.
Keep track of contact hours from the list near the bottom of this page:
https://community.talktalk.co.uk/t5/Articles/How-to-contact-TalkTalk-Broadband/ta-p/2230529
They have never advertised 24/7 support for the phone lines.
Even the forum is only 24/7 in the sense that the whole internet is 24/7, and community members can communicate here 365 days a year. It's not staffed 24/7.
Gliwmaeden2, a fellow customer.
