Paytm — Flight Ticket Refund not provided

My Vistara Flight, Raipur to Delhi (PNR 6KZJ8B), Travel date 18 June 23, 20:20, booked through Paytm was cancelled by the Airlines. I was provided with an option to claim my full refund. I contacted Paytm Travel customer care but there has been no response to my query raised on paytm claiming the full refund. I talked to the paytm customer care agent too and they said refund would be provided but it has been more than 10 days. And now I’m unable to contact them through call. They send a link to open a chat on the app in which they never reply.

My Paytm Booking ID- [protected]