The worst company to deal with it. I moved to a property that they used to supply. I have taken a picture of the meter reading and given it to them along proof of the date that I moved in. They gave me an account no and I switched to another provider and paid their final bill. Then they keep sending me to amount that they owed to the previous owner or tenant. I have emailed them that I have paid my account and they agree that they will not chase me for any more bills. They kept sending me more bills and now the debt collection agency is chasing me for bills that I was not responsible for it. Now, I am going to contact the Energy Ombudsman https://www.energyombudsman.org/how-we-can-help/energy-brokers If you are one of their customers, you should switch providers ASAP. If you are a new customer, avoid them as you would have avoided a deadly plague.