Quite the worst Company I have ever had dealings with. Dreadful inefficient customer service! I would not give them 1 star if there was an option. My smart meter tells me that I am in credit in both my gas and electricy account yet they are still demanding I pay them £600 and I cannot get SP to give me an explation! I have tried phoning them on many occasions (probably wasting 5/6 hours of my time) but just left on the line with zero progress concerning my enquiry. I have an ongoing complaint but SP are doing nothing to resolve the matter. If I owe them money I will pay them but surely i am entitled to an explation!