Amazon India — indian bank refund processed but money not credited in my account.

I have cancelled an order from amazon on 10/01/2020 and 15/01/2020, I received an email from amazon that the refund has been processed successfully and it would be reflected by 15/01/2020 and 20/01/2020 respectively, but i still haven't received the money in my account. When i spoke to amazon costumer care, they told me to fill a charge dispute form because it could be a problem at my bank side.

Name : Shylaja Vasan
Mobile : [protected]
Bank : Indian Bank
Account number :[protected]
Refund Reference # 880570 .

Please resolve the issue.