Air India — Refund of ticket not received

I had cancelled my booking with Air India. It has been more than a month since cancellation and I have still not received my refund. Below are the details of my ticket:

PNR: YQ8HF
E-Ticket number:[protected]
Name: Srikant Elassery
Origin and Destination: Bengaluru to Frankfurt
Date of departure: 02.05.2021
Booked through: cleartrip.com
Cancelled on: 29.04.2021

Please expedite the process so that the refund is processed as soon as possible. I have attached a picture of the email I received from cleartrip regarding this matter.