The big six energy firms have collectively received over 5.5m complaints over the last year, according to the consumer group Which? – as it calls on the government to fix the “broken energy market”.
Npower received the most complaints with 1,383,650 – while SSE and Scottish Power received the fewest of the mainstream suppliers, at 482,582 and 308,648 respectively.
According to the new report, complaints against the big six energy firms – which also includes British Gas, EDF and E.ON – accounted for 97% of the total.
Which? executive director Richard Lloyd said, “Millions of people are unhappy with the service they receive from the suppliers which, combined with low levels of trust is yet more evidence that more must be done to fix the broken energy market.
“Next month we want the regulators to refer the energy market to the Competition and Markets Authority and launch a full scale inquiry. This is the first and most important step towards a more radical reform of the energy market, giving hard-pressed consumers the confidence that they are paying a fair price.”
Green energy companies Ecotricity and Good Energy received the fewest number of complaints – 0.55 and 3.35 per 1,000 customers respectively. They also recently came first in another Which? survey on customer satisfaction.