I was the victim of identity fraud at a Carphone Warehouse branch. Someone set up 2 new contracts on 2 different networks using nothing but my address, bank acc

I was the victim of identity fraud at a Carphone Warehouse branch. Someone set up 2 new contracts on 2 different networks using nothing but my address, bank account details and a fake id (paid cash for the upfront payment). Their incompetence is mindblowing. This company is going to £0.