I had been with BT for 5+ years (BT account no GB18305311). Their service was alright as long as you paid them. When I tried leaving them they threatened me with a £400 fine. I pleaded with them saying that the only reason I am leaving them is because their Internet broadband is very slow in my new property after I moved house. They refused to listen. They constantly threaten over the phone. I have now opened a case with the ombudsman. I have learnt that it takes 8 weeks before Ombudsman opens a case against BT so I am patiently waiting without giving up. I have since moved to Virgin and their internet connection is so fast! Wish I had moved away earlier.