Air India — Refund of ticket cancellation

I had booked a round ticket to chennai on 24th of february this year, and cancelled within 20 minutes of the booking due to unforeseen tragic circumstances, after confirming with the customer care that i will be entitled to a full refund because my tickets are being cancelled well within their 7 day period. The e-ticket number for the booking is[protected]. I have sent them several emails on their id [protected]@airindia.in and have received 1 reply acknowledging the receipt of my trailing mail. I have also called the customer care personnel who keep providing me with other numbers to get in touch with, which never answer. It has been almost 6 months since the cancellation and i haven't received my refunds yet. Kindly do the needful because i am struggling with finances in the middle of the pandemic and need to pay for my accommodation.