Lack of service, waiting authorisation and mislead policy

Extremely angry at the moment. My car is booked for a service and currently at the dealership. With extended warranty taken out they can't proceed because they are waiting for an adjustment to be made from 75k to 90k at Mfc Innovation group. I followed up more than 4 times now and the dealership where my car is at are also still waiting and phoning non stop. We are not getting any feedback whatsoever. In the meen time my car is still al the dealership and they can't work on it without authorisation. I need my car to be serviced. Then not even to mention. I took out the plan for car rental and then after I spoke to them they forgot to mention there is a hire fee which I was informed was part of my service plan. I am not happy at all.