Make my trip - Refund not processed

I made a booking through MMT on *th December **** for my flight on Indigo, booking id - N*************. Later the airline rescheduled the flight to another date, and subsequently, I also made a date change to my booking directly with Indigo as the option was not available on MMT. There was a difference in fare and Indigo refunded the amount back to MakeMyTrip the same day.

When I called indigo to check the status they mentioned that it has already been processed from their end and gave the refund reference number - *********. I tried calling make my trip multiple times, but they will not connect me to a customer care agent saying that all queries can be resolved from the app but the stupid app won't even show my bookings in the trips section. MMT is just ignoring any issues that are not listed in their automated chat or app and providing no alternatives to the customer.

It's been more than a month and I still haven't received my refund.