MakeMyTrip India — Refund amount of flight booking

We had booked returned tickets from delhi to hanoi (Vietnam) and hanoi to delhi in rs. 33942 but flights got cancelled due to covid-19. Indigo returned our money without any deduction but makemytrip only credited rs. 28194 in our credit card account. Why makemytrip deducted the rs. 5748 from the returned amount? What is the reason? We want our money back as soon as possible. Our flight was on 22 march 2020 and 29 march 2020 respectively.
Booking id is : nn[protected].

Note: after discount we had paid rs. 31992 for the tickets.
So remailing amount is 3798

Please find attached bank statement and refund receipts.

Do the needful.

Thanks,

Supriya saxena
[protected]@gmail.com