My appologies, I got them mixed up there.
Now, this time to be helpful.
I was having the same problems a copule of weeks back, started
July 06 even though I'm on a 10MB line I was getting roughly just about 1MB. Rather than get constant refunds, ask the have the problem escelated to either service delivery or the CEO's office.
After doing so myself, they offered me several ways to keep me, and assured me that they are aware of the problems, and are working hard to resolve them. They offered me a free 10MB connection for the remaining 7-8 months of me contract, and also when the problem was resolved I received a bill for rougly £180, which they very kindly withdrew, and I was not billed that month

.
I had the number for them directly somewhere, but wasn't able to find before posting, so if I can find it, I will post it here.