Yes, don't give up, try to call the police and ask if they can go check the other car, even the other car's owner keep said he didn't do it or don't know what happened, those are not excuse at all, the result is what the police said in the report and not the car owner said, my insurance told me even can't found another car's owner, if the report from the police said that is hit and run, the insurance still will pay for the cost of fix your car, won't increase your next year's fee, but may be need to pay for the deductable ($300). When I heard from the policeman who told me the other car's owner said he didn't hit my van, I feel very angry too, so I ask the police what he can do for me or what I suppose to do, also call insurance and ask what I suppose to do, both of them will give you their professional opinion and really help you to settle the problem. Good luck!