Hyundai Motor India — Regarding service problem

We have purchased a i20 vehicle from derik hyundai Nagercoil three months back. Now the vehicle met with an accident. We contacted the service manager of derik hyundai Nagercoil and asked for the quotation in order to claim insurance. But they refused to give quotation saying that the insurance is not made through derik. And also they said they need to order for parts for which we need to pay 1000 at first and refused the same saying the reason that we need to pay 10000 since we have not insured through derik.
Kindly take necessary steps...