Cars24 Services — Almost a year Delay in RC Transfer

I sold my car Maruti Ritz (KA04ML0714), to CARS 24 on 2nd September 2021 (2/9/2021). Now almost one year over but the vehicle is still in my name. I have contacted them multiple times on their Phone/Email and requested a quick resolution to my complaint. Still, unfortunately, no one from their customer care actively helped except by offering me a certificate. How can a person have multiple cars in his name? It has been told the car will be transferred in a maximum of 4 months (120 days) however, after 11 months or more than 330 days, the vehicle is still in my name, and ownership status progress shows pending. I am troubled by the issue and Looking forward to a quick resolution.