still waiting

I had an accident on 30 Jan 2015 at night I was on the robot waiting for it to turn green when another car hit mine from the back. then I called my insurance, who instructed a towing company that was on the scene of the accident to tow my car but I never allowed them to tow my car without receiveing a refence number from MiWay then these ppl tow my car to clairwood branch. When I called MiWay the following week to find out about the assesor's report I was told that they don't know where is my car. I then traced the towing company to go search for my car in their s**** yard then i found it but the issue starts when the towing company refuses to release my car for appointed panel beaters to take it to their site they said they can't do that before Miway pays them. My concern is the courtesy car that I'm allowed to have for for only 30 days but now the problem is it's been 12days without knowing what is happening with car, even the assesor has not been to see the damages on my car. When I call insurance they transfer to many agents each day. I call regarding my claim even I threaten them to cancel my policy but nothing is helping. I am literally on the phone the whole day. PLS HELP