Air India — Ticket refund

Dear Sir/Madam,
I want to inform you I was booked flight from India to paris one way on 23april2020. But because of corona my flight was cancelled. So I was applied for money return thru email and my travel agent ( Make my Trip ) I got email from air India they asking me RA number on 23 January 2021 . So I was given to them on 29 June 2021 . I didn’t receive any refund from last 1 year and 3 months .
I am totally disappointed.
My email id is harneet.[protected]@gmail.com