Air India — High cancellation amount was charged on partially refundable booking

So I booked my ticket through ixigo, and because of rising cases of COVID-19, I canceled the ticket 1 month before the date of travel still I was charged heavily for cancellation on the partially refundable fare type.
and then I was refunded just rs753 on the payment of Rs.14133 for booking.
date of booking: 14th March 2021
date of cancellation:7th April 2021
date of a cancellation initiated through agency:3rd May 2021
travel date:6th May 2021
booking Id: IF[protected]