Dear laney
Did an engineer come out? If so did he say work would have to be done outside - this costs money. I had a bill for £170 for outside which I thought was about £70 too much. I asked NOT COMPLAINED for clarification and BT was appalled by BT and in the most efficient and helpful manner, in three credits, refunded the whole lot. I nearly fell on the floor. That was over a year ago and of course my guess is BT got an order from above to be extra helpful because it was haemoraging customers and this was too enthusiastically interpreted by the staff on the ground. Have a go in querying it and see what happens.