The price of energy is ridiculous and its been a cold winter.
The EDF energy price is not hugely different to other suppliers. The only issue you can deal with is whether the bill is an accurate read and whether proposed (I mean imposed) DDebit amount is reasonable, but if you have been within £10-15 on your account over 12 months its hardly surprising that the last quarter should be a shock.
I'm not unsympathetic, but what is your point?