Air India Express — Long delay in refund of the amount from cancelled ticket

I have made my flight booked in March 2021 and cancelled the ticket due to some issues and I should receive the refund amount of INR 40, 000.00. till date I have not received the refund amount. several emails I wrote to customer care and they do not care for the emails also. I would like to approach court if they do not pay me soon. My ticket confirmation no ITPZNQ.