Watchdog Ofgem said more than 500,000 customers had been affected
Energy supplier npower has been fined £26m for sending out late and often inaccurate bills and failing to handle customer complaints effectively.
Watchdog Ofgem said more than 500,000 customers had been affected, with many suffering “significant distress and worry”, and has ordered the group to pay the fine as a consumer redress package.
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