"The vast majority" of customers are "happy" with their energy providers service, despite a surge in the number of complaints against the "Big Six" companies, an industry trade group said.
A spokesman for Energy UK defended companies like npower and E.ON and claimed they "take their relationship with customers extremely seriously".
The vast majority of energy customers are happy with the service they get with only around one in every 1,400 customers likely to need to contact their supplier about a problem.
Most complaints only need a phone call to sort out - around four out of five queries are resolved by the end of the next working day - but, if the problem cannot be resolved, the energy ombudsman is there to ensure problems get fixed.
Energy companies take their relationship with customers extremely seriously and work hard to improve customer service.
More top news
Time magazine has disputed Donald Trump's account of how he rejected a request for an interview for its "Person of the Year" issue.
The Police Federation chairman said officers were often "letting someone off with a warning and hoping for the best".
A total of 21 are also injured by a blaze which ripped through the upmarket 22-storey hotel on the Black Sea coast.