Delay on car repairs

I would like to lodge a complaint with regards to my Audi Q5 2.0. TDI Quattro, 2013 model. On the night of 24th April 2015 I had an accident and I reported to the police on the next morning of the 25th April 2015 and Police visited the scene and prepared accident report number 18 and case number 84 and were handed to the insurance company mentioned above. I have been insured with them since 2013 and I have traded in my previous car without claiming. Now, I had this accident, I hardly get feedback from them, they told me that they need to investigate my accident and not given me any time frame. My car has been with them for more than 21 days without any progress. The guy by his name JP, threatened me that if they decline my car I will be liable for storage and towing expenses. I am worried that I maybe a victim of circumstances. The way I see they want to run away from their promise and I have been paying premiums consistently and never thought at the end of the day I should be waiting forever, I don't even know the condition of my car where it is and I am still paying for it.