GoAir — Flight cancellation refund for PNR MC83GN

My GoAir flight bearing PNR MC83GN which was scheduled for 10th of November 2020 was cancelled from the airline side on 8th of Nov. I just received one mail from the airline that my flight has been cancelled.
So I called and mailed them for refund for my ticket but I haven't received any response from them. And now on their website it's not showing that the flight was cancelled.