If I could give no stars I would. After being forced over to EDF as our previous supplier went bust, and we were given no choice. The switch over process took way to long and by the time it was complete no other company was taking new customers. EDF have been horrific from the word go, for a start 6 monthly billing in unacceptable, they are horrific at calculating monthly direct debit levels and accept no input form customers who know how much energy they use. The result is being hugely in credit every billing period so they are sitting on customer money which should be in customers accounts rather than theirs. Only response when you can finally get through is a standard patronising stock answer which suggests they have made correct calculations that will be reviewed every 6 months. Yet it is obvious they are not correct. Then the bills themselves, they are constantly refunding large periods and then recharging to distribute miss calculations throughout the year, resulting in incorrect charging at incorrect rates. I have no idea how they can still be operating and why anyone would stick with them. I can only advise everyone to leave them and move to a company like Octopus energy, as a complete drop of their services is the only way to force them to pick up their game and actually care about their customers. We are now in the process of moving to Octopus energy and the experience is already 100% better.