Tata Motors — Regarding Price Protection

I booked the Tata Tiago XZ model on 21/4/2021. Price of the car has been increased from 08/7/2021. But Tata Motors assured price protection of the bookings made before 07/7/2021. Now the dealer (Raj Motors Rohtak) denied me price protection stating that my name is not in dump. So Ihey can not give any price protection. On complain, company forwards my complain to dealer and close it without resolving it. No feedback is taken from me. Price increased Rs. 11617/- and also due to this increase I was charged Another Rs. 19500 Appx in registration of car. Total excess amount taken from me Rs. 31000/ appx