The number of complaints made to about the energy sector have more than doubled in comparison to the same period last year.
1,805 complaints were made to the Ombudsman last month, a 106% increase compared to December 2012.
July and October had the highest number of complaints reported, with 1,867 reported to the Ombudsman Service in total in each month.
Lewis Shand Smith, Chief Energy Ombudsman said
“Our complaints figures tell us just how tough things are for consumers.
“We are now receiving more than 300 complaints a week and often these come from people who have been confused by the tariffs on offer.
“Ofgem’s new rules make life simpler and fairer for consumers, which can only be a good thing.”