Failure to assist timely and accordingly

I had an incident on the high way on the 7th of March,my car has since been for inspection as whenever we call they inform us that they are waiting for the damage report, tried requesting contact details of those responsible for the damage report,either the call is cut off,placed on hold then cut off.My problem is soon I will have to return the courtesy car,the status of my car is unknown of which we dont know how long still will it take to fix :-(