NewCall is Fuel Broadband, aka Primus and they resell a TalkTalk service, so that explains that link.
It sounds like a temporary block has been put on the line, i.e. broadband is connected but ongoing link to the internet is turned off, this might original poster with a billing problem or NewCall/TalkTalk have messed up and turned off the access.
Chasing NewCall is the best avenue, chasing TalkTalk will achieve nothing.