Was with EDF for 18 years, never had a problem until 2017. Bills were constantly estimated, billed every six months.. Far too high and yet credit built up so much, EDF took chunks of credit taking between £900£1500 every six months.. I queried everting, even gave my actual readings in each month! You get absolutely no where with EDF and you are totally ripped off.. Do not expect anything back from this corrupt supplier. I changed to octopus and they only charge what you actually use, and their customer services is excellent.. EDF make you wait over a week before you can even speak with someone and that’s on their WhatsApp, don’t even bother to telephone, you will pay an awful lot for the privilege. Disgusting attitude towards customers and fleece you out of your money. The in home display (meter) is not accurate and dodgy with wi fi communication. EDF must have the horizon system as this is the absolute problem. Avoid and safe your money and go to a supplier who operates from the uk