Started off swimmingly then declined rapidly to the point that we're now going to switch. We live in a four bed terraced house, nothing out of the ordinary, and they've been constantly billing us for £350 a month...in the middle of summer. Soon, almost overnight, for some reason that I've yet to fathom, we were in over £1500 of debt with them. Never had that before with any provider! This caused our (in advance) payment to increase and now it's stratospheric and it's going to bankrupt us. Interestingly, our neighbour have the same house and their fuel bills are about a quarter of ours. Phoned a few times, just banging our heads against a wall. It's a runaway freight train and we don't know how to get out of it. Somethings badly wrong but as long as they're coining it in, they don't care. Inconsistent, overpriced and uninterested. Very very disappointed (and stressed). They're ripping us off.