Empty Promises

I lodged a complaint with HelloPeter a while back regarding an unacceptable waiting time for vehicle pickup and subsequent lack of followup. I was then contacted by First for Women regarding this claim and offered a discount on my excess to resolve the issue. When i was invoiced for the excess, however, no such discount showed. Do i now have to wait even longer (it has been 2 months for a bumper bash) to collect my car? The shop will not release my car until the excess has been paid - as one can imagine, this is an enormous inconvenience.