Air India — Airlines not responding on Money Refund

I Had booked an international flight with Air India in April2021 from India to Canda. We cancelled flight by accepting cancellation charges of 10k INR. We should be getting 49K INR. it has been more than * months but I have still not received the refund of my money.
Need someone to help me out with the refund collection from airlines.
They dont reply to emails, they dont answer calls on customer care.

Passenger Name: Tejini Ankala
E-ticket #[protected]
Travel Date: 27th May, 2021
Please call me at +91 [protected] for any details.

Thank you
Tejini G