Amazon India — Duplicate power bank and not giving refund

Duplicate product .Bad seller..I ordered sony power, after 2 days i checked in order list order was showing " prepairing for dispatch " and on 4th day i recived order from courier, cash on delivery i paid the amount, product was duplicate so i checked in your orders it was showing that seller cancelled the order, unable to return. Seller pls give my refund take return ur duplicate product

Order id :[protected]