Air India — I am waiting for the refund for 8 months

I cancelled my ticket and requested for a refund of $1543 in January 2021. After making 100s of phone calls, emails and fighting through 8 months. I got $595 couple of days ago. How many more months/years I have to fight with you people to get the rest of the money.Why are you embarrassing Indian people in-front of others? Help me if you can.

Ticket no[protected]
Date of journey-29 Jan 2021
Name- Eldho Varghese
From YYZ TO CCJ