Ibibo Group / Goibibo — Refund not received for cancelled itinerary

I had booked three seats on the 18th march 2020 goair mumbai - cochin flight (G8347) through goibibo. The booking reference number was g8/z5f2gv. But the airlines had suspended all its flights owing to the national lockdown due to covid-19 and our flight got cancelled. We opted for the refund option but have not received the cash back yet. We tried contacting the customer care multiple times but there have been no responses yet. They have not responded to at least one of the multiple mails sent by us.