MakeMyTrip India — Full refund for upcoming flight

I have made a recent booking for Flight Tickets from MakeMyTrip with details as below. When I had made the booking from MakeMyTrip mobile application, it was clearly mentioned that there is "free date change allowed". However when I tried doing it from the app, it asked me to pay an additional amount for date change. I am putting down some points informing of the pathetic customer support service MakeMyTrip has provided in the last 2 weeks.

I raised the first query on 29th of January 2022 and was informed that it will be resolved in 2-3 days. But it has not been resolved yet.
Post that I have contacted MakeMytTrip support at least 10-11 times but still my query has not been resolved.
Everytime a new support person is assigned without any information on my issue, since the details are not mentioned in the support ticket. I have been explaining the whole story every time.
I have got a couple of calls from MakeMyTrip persons(again asking me the whole issue) and they have promised about the resolution in 1/2 days, which has not happened yet.
I have been waiting for this from 2 weeks so that I can change the flight dates to 26th Feb 2022 since my itinerary has changed. But because I waited for MakeMyTrip to resolve my issue this long, now the flight tickets are not available. My whole trip has been ruined just because I have been waiting for 2 weeks for MakeMyTrip to resolve this issue.
The only thing I request now after such a tormented experience from MakeMyTrip support is a cancellation of the flight ticket as soon as possible with full refund of my ticket amount. I don't want to explain the same story to every person in support from now onwards. So I am attaching the Screenshots of the proof.