Energy Companies are cheeky bleeders.
When I got out of hospital last year, I'd updated my on-line dual fuel account and found we'd used a horrendous amount of electricity during that 6 weeks (bet they were all partying) - which was most likely dryer being on constantly and the electric heating left on in the conservatory, as my wife was running around visiting me. Anyway, upped the Direct debit quite a lot. Anyway, check to see how the account is now and updated all the readings, and we are £350 in credit. The calculator says if we carry on the same, then we'll be over £1000 in credit next year. So, go to adjust the direct debit, and it will only knock a few pounds off the monthly amount...
So, requested a partial refund, and the monthly amount has come down much more ! So I get my cash back and I'm not overpaying.