Indian Bank — Refund Complain

I am Chandra and I had placed an order Kiran SSC Mathematics book at the cost of Rs.530 in online platform of Amazon on 22nd September 2020. Due to some issue I haven't received the product almost for a month. Finally Amazon had initiated refund for the amount of Rs.530 on 20th October 2020, but still the amount didn't reflect to my bank account. Amazon sent reference number
# 30005102660266237001825 and confirmed that they have processed the refund from their side and told me to file charge dispute form but Indian Bank doesn't have such policy. Kindly help me with the issue regarding refund to reflect to my account as soon as possible.

Card Number: [protected]
Card Holder: G. Chandra

Thank you.