MakeMyTrip India — Refund/Rebooking for the cancelled flight

I booked a flight for 3 people including me from Coimbatore to Mumbai for 31st March 2020. This flight got cancelled by airline due to ongoing pandemic. I have received credit voucher of booking amount in my MakeMyTrip account. I am trying to book a flight for me using the credit voucher but it is not allowing me to use voucher unless i book it for all the 3 travelers as per initial booking. I spoke to airline but there is no such restrictions from their side on using the voucher for booking, as per them at least one traveler should be common as per initial booking. I tried to reach MakeMyTrip customer care using phone call and email but there is no response from there side. It's frustrating
of not able to connect to customer care to get the resolution and utilize the available voucher for my travel.