MakeMyTrip India — Not refunding the full amount without providing service

Booked the flight from MMT from dehradun to bangalore, airlines wasn't able to fulfil the promise so moved the booking 3 days ahead and airlines responded back with full refund, now this travel aggregator CHORTRIP only refunded ~30% amount and deducted as airlines fees.
Without providing any service they deducted 70% amount while airlines is ready for full refund.