Horrible customer service, put my bills up by over 50%, I asked customer 'service' why my bills went up so much all of a sudden and they couldn't tell me. I asked can you revert it back to what it was as my account was £260 in credit, they said yes but I had to ask for this. I asked why would anyone not want this done and she said some people do!!! I asked would she want this and she refused to answer my question. In short very obtuse, and frankly I feel they are dishonest. Just do not use them. Worst energy company I have ever spoken to. One star rating is too generous imo.