MakeMyTrip India — Bus not arrived at boarding point and leave us behind

We booked a ticket for chandigarh to amritsar through MMT. Journey details;
Zing bus
Chandigarh to amritsar (6/12/2021)
1:05 pm departure time

Bus didn't arrived at the location and on calling driver informed that they didn't receive any booking and left chandigarh without taking us.

We have another booking for amritsar to manali on same date in the evening. Due to now arrival of bus in chandigarh, we are not able to catch the 2nd bus too.

Booking details are attached in images

MMT customer care is saying that they can't do anything about it. It's MMT mistake that bus didn't arrived at the location and bus didn't get our ticket. Since, I am not able to complete any of the journey due to your inability in coordinating things. I want refund for both the bookings.