Research carried out by the industry regulator has supported the claim; their findings displayed that consumers want suppliers to use clearer terms when describing prices and energy use information.
It was also found that many would welcome help from their supplier in finding the right tariff.
Ofgem's claim follows E.ON's announcement that it will be making improvements to its Direct Debit policy.
This move has been welcomed by Consumer Focus, with their director of energy, Audrey Gallacher, stating: "We welcome the move by E.ON to change its Direct Debit policy.
"It's a victory for common sense and hopefully the first of many steps the company will take in its Reset Review programme to improve the experience of its customers."
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