GoAir — Ticket canceled by Goair but no refund from airlines

Go air sent flight cancellation on 20th November 2020 for flight scheduled on 22nd November. Today on 24th December I have called the Go air customer care for more than 15 times and still did not get the refund email. And on top of that each time the representative is telling Refund email will be sent within 10 to 15min after this call and I never got the email. PNR RBENYD