MakeMyTrip India — Over charging on the tour rate to ladakh

I book an Ladakh 29th March 2023 for Ladakh.
We were suppose to pay nearly 2, 32, 000 but at the moment of payment of the booking fee it raised to nearly 2, 42, 000.
We were offered 46, 400 per head for 5 people and while booking it went to 48, 400 per head.
Now our cousin had also booked for the same trip booking after us for approximately 39, 300 per head. That is nearly 1, 18, 000 for the 3 of them.

Why is there so much of price difference between us for the same exact trip.