Settlement of Claim- Insurance co

I had purchased new car , but unfortunately due to some uneven caused my car got damaged within one week time from date of purchase and i had put my vehicle in to miles motors garage for repairing, the vehicle is fully insured by insurance company , the insurance company surveyor survey the damaged vehicle and verify the damaged parts which need to be replaced, and accordingly parts quotation of Rs. 1.19 Lacs ( Approx ) submitted to the surveyor by dealer, but due to negligence of miles motors staff ( Mr.Viral Patel – Service incharge ) he left out one of major parts cost of Rs 15000/- ( Approx ) in the quotation, and the said parts is replaced in damaged vehicle and accordingly the final invoice of Rs. 70, 000/- has been prepared after the repairing of the damaged vehicle by miles motors , and i had pay cash for full amount of invoice & submitted mile motors repairing invoice along with the other relevant documents to the insurance company for processing the claim. While processing the claim by Insurance company insurance surveyor deduct the said amount parts cost which was not shown in the quotation (which was duly submitted by miles motors to insurance surveyor at the time of survey), hence he has deduct the amount of Rs. 15000/- ( Approx ) from the claim amount and conclude that parts which was not shown in the quotation not to be passed for claim though it has been actually replaced, I have address this issue to insurance company but they denied to process the said amount and stated that this mistake is done from dealer you need to resolved from dealer end, from the both side i couldn’t get any positive response from their end, Sir kindly help me out in this & advise me to whom i have to address my this issue to get this rejection claim amount. Further in this connection insurance company has stuck my claim due to discrepancy found in temporary vehicle registration , in discrepancy insurance company found that temporary vehicle registration certification date was after the date of vehicle accident. the insurance company argued that during the accident of your vehicle is not registered hence we are not liable to settled your claim. sir i think vehicle temporary vehicle reg validity is for one month , and the dealer has paid the amount within one month but my vehicle has been damage before the payment made by dealer for vehicle temporary registration. sir in this scenario insurance company can reject my claim, please advise. Thanks & Regards, Amit Untavatkar ( M) [deleted], [deleted]