Tata Motors — Booking corruption

I have booked Nexon XZ+ on 1st December 2020 in the name of my spouse and I was informed the ex show room price was 964500 Rs. But now they again informed me that the increased price will be charged from me. I think it's a open violation of consumer act. I have a doubt also that they had waited for the price hike to order my Bookings.
If this is, then I may cancel the Booking.