I have a key meter thingy and spend about £30 a week on electric.
How big is your place? How long have you lived there? Did you run up a big bill before the key meter was installed? Or was it already there when you moved in?
If you ran up a big bill and you're now paying off the existing debt and current usage with the key meter, fair enough.
However, if there was already a key meter there, there's a chance that a previous tenant or owner ran up a huge bill and the debt was still on the meter and you're paying off someone else's debt.
That happened to an ex of mine, he moved into a little two-up two-down terrace, it had a key meter, which he wasn't fussed about, thought it helps you budget and manage your money, but he was going through the keys at a rate of knots and it was really expensive.
It turned out that when the previous tenants had moved out, the gas company hadn't wiped the previous tenant's debt off the meter, they'd left it on and the cheeky b@stards were getting him to pay off someone else's debt. Nice for them, squares their books and they're quids in.
I don't trust them. There were key meters when I moved into my flat and because of my ex's experience I insisted they removed them, they were reluctant to take them out. I had to really insist, pointed out that if I ran out of gas or electric late at night, the nearest shop was past a car park and derelict building, past a homeless shelter that housed loads of alcoholics and drugs users, and if I had to go to the shop late at night because they'd refused to remove the meter, and if anything happened to me, like being mugged or attacked or anything...
You can get them to check that it's set at the right rate.
Ours is fucking massive but I can't work out why
I used one of those wattage meter things borrowed from my neighbour but nothing seemed to be using excessive amounts.
Ho hum.
Have you got a key meter madzone? Same might apply to you, if so get them to check the rate at which they're charging you, and that you're not repaying someone else's debt.
Alternatively, they have a habit of massively overestimating bills, getting too much money up front off the customer. Check what the reading was on your last bill, and check what the reading is on the meters, see if there's a huge discrepancy. If your bills are estimated, take a reading and phone it in, ask them to reissue the bills. I did that with my electric bill, and it went from me owing them about 130 quid, to me being 50 odd quid in credit (but then I have been working away a lot).