Air India — No Refund even after one year of cancellation

I have cancelled International travel ticket in February 2022 (Ticket no[protected]/44 and case no 18271872, it's been a year after cancellation and I have not received refund yet. Whenever I call customer care they say it's already refunded but can't provide me any reference number. It's total scam they are doing. I have been following up with multiple calls and email and requests through their portal but no luck. Please help me to get my refund at earliest, Thanks.