Bank Of Baroda — refund from amazon not debited in account

Refund of rs. 875/- has been made by amazon on 31st of december 2019 regarding a product with transaction id #upi/[protected]/22:48:20/upi/[protected]@apl/you
"the reference number of the refund is ref[protected]
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 responss 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.