New India Assurance — regarding lost of rc book

I ramakrishna the owner of swift vdi (Kl 54 g 8157) left my car for insurance claim on 26/10/2017 at sri amman cars india (P) ltd, dharmapuri branch
(Adress : collectors bungalow road, a. Jettihalli (Post), dharmapuri 636807). While leaving car i also submitted my car original rc book, insurance papers and driving license. But after claiming insurance left the showroom on 28/10/2017, the showroom incharge people has not returned back the original rc book, insurance papers, license. When i asked them they told me that they will provide us on (30/10/2017). But till now they dint even return me back and telling that they lost all those papers. I have attached the photocopy of the insurance bill and my photocopy of rc book so please kindly rectify the problem as soon as possible.