British Gas sends me two bills – and threatening letters

A British Gas customer was in credit, but the supplier still sent threatening letters over non-payment. Photograph: Rui Vieira/PA

I am having a nightmare with British Gas. It is double-billing me for my flat, and I can’t get it to listen.

For the past year I’ve had a British Gas account in my name and pay my bills by direct debit every month. However, the company is also sending another set of bills to “the occupier”.