MakeMyTrip India — Wrong refund and not replying during covid 19

Address:

MakeMyTrip India Pvt. Ltd., DLF Building No. 5 Tower B DLF Cyber City, DLF Phase 2 Sector 25, Gurugram, Haryana 122002, India

I booked a flight on 21 feb for lucknow to ahmedabad on 13 april. so a message came from indigo nearly 20 march with options 1. because of delay in flights you can cancel your flight with full refund.
so i cancelled it 24 march. now many requests had been made to makemytrip because their contact are not working. but a day one customer care attended the issue.
the case is indigo had already refunded 2999 rupees into the account of makemytrip. now they are deducting 800 rupees at their step
details are as follows

500 rupees as paypal redemption
and 300 as makemytrip convenience fee

earlier my pnr was kefvpy and now they have changed at their ease as bm4l7k

but when i am not travelling and indigo has refunded 2999 rupees why are they deducting money at their step?

if they will not refund me and not be getting help from consumer complaints forum. i will be registering an fir against this fraud company for cyber crime.