Fraud made on car purchase

Hello Sir, I sold my Suv to a buyer from OLX, he inspected the car and the deal was locked at 5lac, next day he visited me and made payment to tata capital for the loan amount that was 74K and he paid me 26k in cash. Rest 4Lac Cheque was issued stating it is a bankers cheque, it was from Federal Bank with no account holders name on it, As it was said that it is bankers cheque and the way it was filled with my details it seems to be a Genuine one with those plastic stickers on the Amount. I deposited the cheque it got bounced and the reason was mismatch in signature. I called the person he gave me a diferent cheque from his Saving account which again got bounced reason insufficent funds, then he shared a fake NEFT screen shot and again a cheque which got bounced reason insufficent funds. now he has my car with registration docs and Transfer from signed. i have all the records of Cheque bounce call records & few photographs. I also have the Noc. Its been 11 days since the sale is done and I do not have possession of my vehicle. What should I do in this case. I need some legal and strong advice. Also now his phone is switched off.