Bank Of Baroda — funds not received

Address: Ahmedabad, Gujarat

Refund of rs. 748.24/- has been made by amazon on 04th of sept 2019 regarding a product. (Order no is - #[protected]
"the reference number of the refund is ref - 123704..
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 responses 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.