Bank Of Baroda — refund amount send by amazon not credited in my account

Website: www.bankofbaroda.co.in

A refund has been made by amazon on 19th of april 2018 with refund reference number[protected] regarding a product which i've ordered through the amazon. But the refund has not been received yet. Bank is saying no amount has been received by them. I've talked to them again and again but no response is coming. So i need to file a "charge dispute" on them, to get the full details. I need bank to resolve this issue as soon as possible or i'm gonna take some legal action
And
The authorization code (Refund reference number) for the transaction is[protected]

Bob account no [protected]
Name - rohit kumar
Mobile [protected]
Email - rkaith.[protected]@gmail.com