MakeMyTrip India — Refund not processed cheating service charges

I booked a ticket in maketrip from Mumbai to Trichy. During the booking time make my trip service charges they input is 299. to technical reasons in indigo the flight cancelled by airlines. So the airlines refunded my amount. For this transaction again they deducted 299 from my refund amount. Why i should double service for non operational flight cancellations. Mobile number [protected]