Energy companies will need to "put customers first" and be "much more transparent" about their profits if they want to win back public confidence, the head of Citizens Advice said.
Gillian Guy said they were dealing with 90,000 problems to do with energy companies each year as customers were hit with "unclear" bills.
Price hikes of 36% over the last three years, coupled with poor customer service, has compounded the lack of trust in energy firms as households struggle to afford to have a warm home.
The Citizens Advice service deals with 90,000 energy problems each year. People are being hit with large back bills, find their bill unclear and direct debit customers are frustrated companies are holding onto their money when they're in credit.
Energy companies need to put customers first and be much more transparent about where they make their profits.
More top news
David Cameron faces a revolt over the EU referendum, as he is accused of "disrespect" for dismissing local party activists' views on Europe.
Dame Helen Mirren was forced to improvise during an awards acceptance speech as mic slips to down to half her height.
The Duchess will carry out her first engagement as Honorary Air Commandant of the Air Cadets after assuming the role in December.