Beleaguered energy supplier Npower said it was "making good progress" getting to the root cause of problems with its new billing system, despite accusations this lead to the dubious title of "most complained about energy provider".
Roger Hattam, director of domestic retail business for NPower insisted the firm is tackling its customer service problems.
We wrote to all our customers during this period last year apologising for the impact on them of issues we have had with the implementation of our new billing system.
We are making good progress in dealing with the root causes of this, but remain totally committed to resolving any problems this has created for our customers.
More top news
Ahead of its roll-out in Manchester, some Universal Credit recipients describe feeling "trapped" as they wait weeks to receive benefits.
The trial of a soldier accused of trying to kill his wife with a sabotaged parachute has been shown video of how it could be done.
An ITV News investigation has uncovered the staggering scale of disruption caused by over-running roadworks across the country.