Cars24 Services — No RC transfer even after 9 months

I would like to bring this fact to the notice to the CARS 24 and all the buyers that when you sell your car, insist on getting the transfer within stipulated time period. I am going through a very bad experience, as they have sold my car to such a bad person that he has been issued 10 challans in a period of just 9 months. They include rash driving, red light jumping, improper parking etc. And all these challans are in my name. He may kill somebody someday and I would be found guilty. So this is my humble request and a warning too, that I may be given required papers which show that my car has been sold to whom. Act ASAP.