Air India — Refund of cancelled ticket not received

Dear Sir/Madam,
I was trying to book the ticket for August 22, 2020, Delhi to Toronto using Air India mobile app. I had made the payment, money was deducted and it resulted in an error page. Because of which I had booked another ticket. There was no ticket generation in the app, but the ticket was mailed to the e-mail ID. Following are the details of the ticket:

PNR no.: JKZBL
Name: Saranya Chandrasekharan
Flight: Delhi to Toronto / 22 August

I had called the Air India call centre and cancelled the ticket on 1 August 2020. But, I have not received the refund yet. I am in need of money and please refund it as soon as possible.