Hello everyone, I'm new to this so if I say something that there is already advice for please refer me on. My problem is with the electricity supplier npower. some years ago I got talked in to joining npower, and at the time I didn't know they had a reputation for bad selling practices and poor customer service. within a few weeks they sent me a bill for my electricity. as I have a prepayment meter I was unnerved by this so I phoned them and was told not to worry about it as the bill was an estimate and it would be paid in any case by regular payments on my meter. however, when I left npower they sent me a bill for some £800 which they said I had to pay before I could leave them. I refused and when I asked them what the charges were for they said that they had been charging me an old rate for my power. I explained that it was their responsibility to update their meter charges, I had not refused their staff access to my property and told them that I wouldn't pay for their failings. Eventually Scottish power took over and I was able to transfer away from npower. I heard nothing more from npower for some years but now they're sending me demands for £63 pounds and threatening court action if I don't pay. what should I do? I can't afford to pay for their mistakes.