I was with scottish power for years never had any issues until I was put on a pay monthly meter... as soon as that was installed bill were not sent out or put up online everytime I phoned up I was given different bill amounts even being told I owed nothing to then being told I owed over 200 pound the day later... also being told to do different things /different excuses... eventually decided to leave them after 6 months of hell and numerous phone calls every week and complaints being made... the only way they would allow me to leave was if I closed the complaint.... but then they wouldnt allow me to until i paid a 300 pound bill they have estimated even though I'd kept up with meter readings.... i refused to pay a penny until they switched to the new supplier who I am now with.. so happy to not be with scottish power now... I still owe 322 pounds and have had very horrible letters/emails every week since even one telling me they will add another 128 pounds if they send it through a debt collectors even though I have phone up multiple times asking to set up payment plans and no help.... do not use scottish power they are ok until u need something sorted by them