Unfair treatment by the Insurence

On the 12 May 2019 I left my car at a car wash to be washed late, hours later I realized that my car was not at the spot I last saw it and started to look for it and asked the other guys that were busy washing the cars. I found out that one of the guys that works there took the car and when the lady who owns the car wash called him, he said he was on his way and few minutes later when they tried calling him, he never answered again. The boy came back hours late to report that he was involved in an accident, I had to go get my car at that particular place. I put in a claim with my insurance (Auto & General) and had also opened a case at the police station. The issue here is that according to the insurance they will not be able to fix the car as the description at the police station says " Driven without owners authority", they insurance says they will only be able to help me if the police can change the description to " ****** and recovered". Been to the police several times and today the 05 June 2019 had a chance to speak to the Station Commander at the police station and he advised me that the description shouldn't be an issue because everyone has their own way of interpretation. The police are not at liberty to change any charge as the charge is determined by the court and not the police. I feel that Auto & General are just trying to find a way of not fixing my car, they are quick to debit my account on a monthly basis and when a claim comes their way they are not as quick to help. I also feel that in a way they are punishing me as if I'm the one that told the child to take the car and crash.