A spokeswoman for gas and electricity providers dismissed suggestions the sharp rise in complaints was a sign of a poor energy service.
Energy companies resolve most complaints "within a few working days", the spokeswoman for Energy UK said:
If a customer has any concerns relating to their bills, they should contact their provider as soon as they can, and if possible have an up-to-date meter reading to hand which will ensure their bill is as accurate as possible.
Energy companies work very hard to resolve problems and most complaints are fixed within a few working days with no more than a phone call.
More top news
Fire crews released a woman from an overturned car after it went off the A12 at Ingatestone in Essex.
Star of cult TV drama The Wire actor Idris Elba has said he sees himself as "an odd, tall black man that doesn't quite fit in".
Big celebrations for one couple and their families after they got married - in a busy shopping centre !