E.ON's chief executive has admitted the energy supplier did not have "enough rules, checks and oversight" in place, after Ofgem ordered the firm to pay £12 million to customers over mis-selling.
Tony Cocker said as part of overhauling its sales operations the company has ended face-to-face sales and outbound residential cold calling.
He added: "It is completely unacceptable that we may have been unclear with customers about their tariff choices and as a result those customers may not have made the best choices for them [...] There was no organised attempt to mislead, and Ofgem has acknowledged this".
E.ON has said it will compensate customers it may have mis-sold to. Find out how to make a claim.
E.ON boss Tony Cocker has apologised after the energy firm was found to be misleading customers, according to an investigation by Ofgem.