Indian Bank — refund issue with amazon and indian bank

My name is loknath and i had booked bus ticket on 16th march 2020, through amazon amount of 934rs and refund 200rs in amazon pay and 734 rs as bank account, the bus cancelled by travelles only. Amazon saying amount was refunded, still amount is not crediet in my account. Refund date 17th march 2020 amount of 734.50 rs. Amazon sent this reference number (072510) and told me to fill charge dispute form but indian bank doesn't have such policy. So please kindly respond to this complaint it's very urgent.

Thanku sir