I have been with N power 10+ years, Dual Fuel and October 2013 I moved house and took NPower with me. Have been receiving electric bills no problem but 17 months later not received gas bill as problem with computer!! Not to worry they said you are top of queue now(Nov 2014) it will be sorted and we will compensate you plus back billing will come into it! Its now February 2015 and still no bill have been in touch with Ombudsman - total waste of time as they cant do anything as they are aware of issue with Npower so I don't know who to turn too! Even if I leave Npower been told it wont generate a bill so what do I do - hang on and wait and get compo but possibly lose out on cheaper competition or say enough is enough, leave and keep waiting for bill to eventually arrive? Meanwhile im £600 in credit with them !! Never had a problem with them before this and would recommend them but can honestly say would not dare recommend now!