Car Insurance Claim

Last Nov 11,2010 I had an accident. It was not my fualt according to police report so the insurance of the other guy has to pay for the repair. I went to Oman Insurance (others guy's insurance) and give a a paper for an estimate to there approved garage. After a few days I called the garage about the estimate for the repair, he then told me that it was submitted to the Oman Insurance and told me that me car will cancelled beacuse the cost for repair was high. I called up Oman Insurance and they told me to that they could not repair my car and it will be cancelled. Insurance told me they will pay the current value of the car (Renualt Megane 2005). I did what they told me to cancel my my car so that they will give me the money. I have cancelled my car and went to Oman Insurance and I was shocked when the agent told that my car is worth 4,500QR. I know Renault Megane 2005 resale value is not thet good, but 4,500QR for my car is just way too low. I have checked the prices through internet and my car would cost 15000-17000QR, lets just say if I can bargain with the dealers at least I could get it around 14,000QR. Oman Insurance told me that 4,500QR is the value of my car on the market which I dont believe. Can anybody give an adive what to do. Is there any legal action I have to make so that the value of my car will be assessed properly.