Air India — Full refund due to medical reasons

I had booked air tickets with Air India for 14th march from Bengaluru to Delhi and I am a senior citizen requested through call and email to Air India for cancellation and full refund due to medical reasons and have provided them Medical Certificate also for the same, I have to undergo a surgery and doctor has advised me not to travel for this week. But Air India is not accepting that and refusing to refund my money and I am not financial welloff. I have also requested to provide me either a voucher of same amount for future booking or any open ticket so that my money will not be wasted but they are not co-operating. I need help in this concern. my PNR number is 6JJ9NZ.

Kindly help

Thanks And Regards
Kashmiri Lal Rawal
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