I have recently changed my gas and electricity supplier from NPower as I found them to be totally incompetent. They told me that I owed them £1900 which I knew was incorrect as I had been hospitalised for a month when I was alleged to have used over 1000 units of gas. I queried this and after repeated enquiries, without and result I contacted the Fuel Ombudsman and it was found that far from owing them, I was in credit by £400. Their Back Office and Customer Relations Depertments are totally incompetent and continually blame it on their computer system.Their online accounts are down more often than not. I would not touch them with a barge pole.