I moved to my small 1 bedroom flat in August 2020 and always paid my bills on time. Almost two years into this, it turns out that I owe them over £900. My bill has always been between £40 and £60 which seemed reasonable given the fact that my flat is small and electricity only; they told me every bill was instead over £100 which is not what the website said at the time of paying. They never told me I was behind with payments and I want to believe I wasn't. The bills are incorrect, messy, misleading. If I knew every bill was £100, I would have switched providers two years ago. I won't be paying this debt as it is outrageous. It has been a battle with their customer service and it is impossible to get this explained/sorted. If I could give less than a star, I would.