Customer complaints about energy firms rose by almost a quarter last year , according to the energy ombudsman . Consumer grievances jumped by 40 % to zero , compared with 52,937 in 2014 . The independent adjudicator said billing remained the most common problem , accounting for over eight out of 10 complaints in 2015 . Late and inaccurate domestic bills were perennial issues . Customers who had problems paying either suppliers or tariffs accounted for 70 % of grievances . The figures were published as the big six electricity suppliers faced renewed pressure to cut prices to reflect falling wholesale prices . bill Nolan , chief executive of energy watchdog Ofgem , said this month that customers should be seeing bigger bill cuts but suppliers were still struggling .
Customer complaints about energy firms rose by almost a quarter last year, according to the energy ombudsman. Consumer grievances jumped by 23% to 65,168, compared with 52,937 in 2014. The independent adjudicator said billing remained the most common problem, accounting for over eight out of 10 complaints in 2015. Late and inaccurate domestic bills were perennial issues. Customers who had problems switching either suppliers or tariffs accounted for 9% of grievances. The figures were published as the big six energy suppliers faced renewed pressure to cut bills to reflect falling wholesale prices. Dermot Nolan, chief executive of energy watchdog Ofgem, said this month that customers should be seeing bigger bill cuts but suppliers were still overcharging.