I bought a flat and from the very first day (the completion date) set the gas and electric with Octopus. I was renting a room before with bills included, so, wasn't with any other energy supplier. The flat was tenanted and their energy supplier was British Gas. They moved out more than a month before the completion date. After a month of living there I received a so called "final bill" from British gas up to the date I actually moved in. It addressed not to me, but to the "occupier". The period they mention the flat was actually empty, but it definitely wasn't mine and I didn't live there. Maybe it included all the previous debts of ex tenants. When I first received this bill (£120) 2 weeks ago, I called British Gas and explained that this bill is nothing to do with me, because I moved in after this period. They told me: "Just ignore it." Today I received another reminder from them to pay the bill addressed to the "occupier". Shall I continue just ignoring it and the future reminders as well? What could be the consequences?