Bank Of Baroda — refund for my product made my amazon

Address: 110084

Refund of 659 made by 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 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.