I told Ovo Energy my bills were low – now it wants £1,500

A man looking at the website logo for energy company Ovo Energy on his phone in front of his gas cooker Photograph: True Images/Alamy

In December I received a distressing letter from Ovo apologising for a significant billing error and revealing that I owed £1,500.

It followed up with an email indicating a drastic increase in my direct debit from £215 to £600 a month. This rise is beyond my means and when I called, the still unmanageable £370 was suggested. I’m genuinely worried and need your help to resolve this.