Air India — Refund not received for Cancelled flight

Booked ticket on 9th January 2020, for AI flight departure on 25th May but flight was cancelled by Air India due to COVID19 and it has been 6 months the airline hasn't provided a refund.I did followup emails with Indian Eagle since they booked the flight. It’s been long time and we keep paying credit card interest for this amount and in financial crisis. It would be appreciated if Air India Refund money.
Refund Amount - $3910.00
Ticket ID - JJ41H6