Update: TalkTalk really are trying - and this looks like a case of a discussion point on this one line rather than a more general policy, so stand down the panic for now... Let's talk to them!
Latest from TalkTalk - if the broadband service they sell us gets a fault, their side of the agreed demarcation point (e.g. in the line itself), they will not even try and fix it, but will decide that they can no longer provide the service.
So get a fault - fix by ceasing the service.
I guess that is one way to stitch up your customer!
Well done TalkTalk - you are sinking lower than BT Wholesale now.
Update: We may be making some progress on this, so no need for everyone to ask us to move them back to BT just yet, but thanks to those that did ask. I do hope that we will soon have more sensible ways of working with both providers.