Moved into a house supplied by GNE. Switched immed...

Moved into a house supplied by GNE. Switched immediately but this left a period where GNE were our suppliers for a few days.

They signed us up for a new account without our knowledge, started sending us outstanding bills from before we moved in, we've told them we're not responsible for the previous tenants bills. They keep sending warning letters addressed to "The Occupier" and notifications that bailiffs are going to come round.

Meanwhile, we're still waiting for our final bill and there's no sign of change.