Probably EON. I SWITCHED AND I THINK THEY ARE TRYING TO LURE ME BACK. GOT SICK & TIRED OF BEING HASSLED TO GET A SMART METER. ALSO NEW SUPPLIER IS SAVING ME £50 PER MONTH. THANKS EON IF IT HADN'T HAVE BEEN FOR THE CONSTANT HASSLE I'D BE £50 POORER :)
Calling every day, It's so annoying. It's apparently Eon, But they didn't know that I had an account with them, Cold call sales. Young call centre workers working on bonus I'd guess