If you're among those who've complained about a high gas bill only to find it was indeed wrong, you may have missed out on compensation.
That's according to Which?, anyhow. The consumer champion said that families could be missing out on compensation when they don't get around to lodging an official complaint over incorrect bills and other issues.
The report showed that last year saw the big six energy firms receive more than a staggering four million complaints. However, it added that the majority of people making complaints which aren't resolved miss out on compensation for not taking the issue to the energy ombudsman for resolution.
But what are we complaining about the most? Which? reckons that inaccurate bills and meter readings cause the most problems. It estimated that unresolved cases could see consumers missing out on some £4 million of compensation overall.
With family life so busy in this day and age, time is a precious commodity. Bearing this in mind, more than a fifth of those polled said they didn't complain to their supplier despite experiencing issues.
Richard Lloyd, Which? executive director, said: "Ofgem, the energy regulator, should publish the truth about the full level of complaints in this essential service.
"Energy suppliers should be held publicly accountable, on a regular basis, for putting right the problems their customers are reporting.
"It is a sign of the level of frustration with this industry that so many people have a problem but don't complain, even when they could be missing out on compensation."
An annual energy company satisfaction survey carried out by Which? showed that the biggest six energy suppliers - British Gas, EDF Energy, E.ON, Npower, SSE and Scottish Power - were all rated poorly by their customers.
We all spend a decent chunk of our wages on gas and electricity bills every month, so we want to feel we're betting the best possible deal for our money. Take a look at this guide to
switching your energy supplier, if you feel it might be time for a change.