complain against insurance company IUM

The claim has been logged with IUM since 26 February2021,it is a 3rd party claim.my claim number IUL22548 I have provided them with all they needed to further my claim,I called them every 2weeks but they keep telling me the claim is waiting for MacDonald to give them the service car history.The claim is lauched against Macdonald trucks and they are insured with ium insurance the dont call me to give me any feedback wen i call them they give me same responds to say my claim is not the only one dealing with.I need help as my claim they were saying my car is a right off i should take it to a salvage company while they cant even answear my emails.I dont have car to use to go to work wen i ask them questions they always says internal investigations takes time even wen their client driver accepted to loosing control of the vehicle he was driving,hello Peter please help to resolve the matter