Avis is not providing Santum with detail for claim

My insurance rented a courtesy car from Avis for me and it was dented on the bonnet while in my possession I reported it and when the car returned they deducted the repair amount from my account. Now the person responsible for the dent has submitted a claim towards his insurance so I can recover my money and Avis is just not concerned and they have not cooperated for the whole month...They need some documents and the money will be paid to Avis and in turn they must pay my money back. <br> <br> I'm very disappointed with their service.