GoAir — Refund not processed even after 1 year of flight cancellation

I had booked flight tickets on GoAir flight through Makemytrip.com. I have 3 PNR that were cancelled just 3 days before the travel date. last-minute cancellation caused a lot of inconvenience to me. I had to pay almost 12000 rs to book my ticket at the last minute. I have not received the refund so far for these PNRs. I have contacted GoAir and Makemytrip many times, but there has been no proper response.

PNR 1 : XG89SH
PNR 2 : XG89SH
PNR 3 : XG89SH

Please help to process the refund immediately as this has caused me a lot of trouble financially already.