An investigation has been launched into some of the country's biggest energy firms over claims they have increased direct debits for millions of customers.
Following a surge in the price cap, Ofgem, the market regulator, said that there have been "troubling signs" that some companies are overcharging customers. It's claimed some have increased households' direct debits by more than necessary to cover a £693 increase in average bills.
Although monthly charges can be increased by suppliers, it must be according to the household's usage. You also must be notified of this beforehand - usually at least 10 days before it goes up, the Mirror reports.
