RTO India — Original RC book not yet dispatched

Respected Sir,

I had purchased a new vehicle from Wasan Motors Borivali East showroom and got the the delivery of the car in the month of December 2020. While I have the tax invoice with me, the original RC book which was expected within 60 days is not yet recieved. It has been 120 since vehicle registration and the showroom keeps saying delay is from RTOs end.

Please help me with a quick solution here