Air India Express — PNR issued but no ticket and refund

Address:

india

I booked a ticket on may 2nd 2023 for my family.
(CNN to DXB-travel date 16th may2023)
I received the PNR number(T453YM) and debited the amount from my credit card but the ticket was not issued.

When I checked the status with PNR it was shown that the booking was cancelled and refund in process. But I haven't received the refund until now.
i send an email stating the same and attached credit card statment and PNR Status screenshot.but no response.