CarTrade.com — Cartrade certified car bought through 'Autofin Solutions' - Legal Papers not issued, after full payment of purchase

Address:	411006
Website:	www.cartrade.com

Hello,
few months ago i bought a pre-owned Ford Fiesta from a dealer in Wakdewadi area of Pune, dealer goes buy the name 'Autofin Solutions'.
I shortlisted this car through online website 'Cartrade.com', which was as per the 'Cartrade.com' was a certified car. The dealer assured me that a within a week all the papers will be transferred to me along with insurance and registry. Now, it has been over 8 months but dealer has not issued any kind of registry papers, inspite paying him the full amount that they quoted. Initially I said i'll only pay the full amount on the disbursment of the registry papers & insurance papers, to which the dealer said, the owner wants the full amount and then will he be ready to release the papers. And hence i paid him full amount (with dealer's assurance that i'll get the papers within one week).
I cannot drive the car that i bought, it has been lying in garage since last 3 months, as i am fearfull about the challans and RTO regulations not to drive without the complete papers, moreover i am getting this notion that either the vehicle had been through fradulant conduct or had been illegaly owned by the dealer.
Please advice me what should be done in order to get the papers.