MakeMyTrip India — wrong refund against cancellation mmt booking id-nf[protected]

Dear sir,
I booked a ticket from makemytrip with above id and my indigo pnr number is nht5tp for 13th of april 2020.
The flight was rescheduled by the airlines and with the available options i cancelled the ticket directly with the airlines claiming a refund. I intimated the same to makemytrip.
The airlines cancelled my ticket and issued a refund of rs 13218/- without any cancellation charge. Credit note was issued for refund to makemytrip.
Makemytrip made a refund of rupees 3624/- only to my bank a/c after deducting their convenience fee and insurance claiming that the airlines have charged a cancellation fee of rs 9000/-.
As such i want a full refund of 13218/- as issued by the airlines.
Kindly look into this matter and resolve as quickly as possible
Thanks and regards.
Rajiv mehrotra
[protected]@gmail.com
[protected]