BT are like the Government, completely unaccountable but then again there's no real competitors as even if you go for an LLU setup the copper coming into your home or business is still rented by the LLU provider and only Openreacj can carry out any work on it.
So there's no commercial pressure on them, I might have been tempted to kill the DD mandate though and pay half your bill via their site.
When they contact you just tell them you are paying for the proprtion of service you have received.
On second thought probably not the best idea as they would probably murder your credit rating.
Best just ring up several times a day and badger tham till they fix it and get your neighbours to do likewise.
If it goes over 8 weeks complain to Ofcom, I bet they wouldn't allow a corporate account to be without service for 2 weeks.
Absolutely dreadful that this kind of caper is allowed in 2011.
Virgin (ADSL) => Namesco => Newnet => O2 => Plusnet => Zen => Newnet => Zen Lite 8000
Note: I don't lay turf for anyone. astro or otherwise, all views and opinions expressed are my own based on experience.