Flipkart — Refund is not satisfactory

Address: India

The flight DELHI to ROME, PNR-FI2SFS has been cancelled by Emirates.There is intimation of cancellation of flight till 10 Aug21 11:59 hrs.
As per Emirates there is no cancellation charges deducted of my flight.
Full Refund of amount had been given back to flipkart.
As per rule the flipkart is authorised to deduct only convenience fee.I
want my remaining balance to be refunded but they deducted Rs.5200/-.
I am fatup again & again calling to them.