Boy I have a story to tell. We changed to green star at the end of 2018. My mum was at first put on the wrong tariff instead of pay as you go smart meter. Secondly when we confronted green star about this issue they would phone us back. Sadly this never happened. We kept on ringing them and promising call backs which never happened. Until we started getting threatening letters saying that our bill was not paid because we thought we were transferred over to a smart pre payment meter. We are refusing to pay this as it’s their fault. Why should we pay for something if it’s in their error? But my mother was not having and decided to set up a payment plan so we could clear arrears of with them. We somehow amazingly got a call back saying that £25 a month because of our finances and other bills and because of our low income . They said that they’ll call back within the week. That was 3 months ago. No one has phoned back since. So we decided to go with another energy supplier because of their screw ups and we’ve gone with a company which just does smart prepayment pay as you go. Green Star are a very bad company. Never go to them at all. You’ll only suffer pain and negative experiences with them.