Air India — Refund request against cancelled flight ticket

I have cancelled an Air India returned flight ticket of my family member of Doha to Hyderabad against ticket # JY94S ( Passenger name: Atiya begum) in the month of Feb-2022 but till now refund request has not been processed. I sent multiple emails & multiple online request for this refund but no action has been taken. The pathetic situation is no body is responding on this refund request as there is no designated team/customer service to answer these queries. I speak to customer service over to their call center & every time they are saying same answer we are working on it but not giving any time line about the refund.