Amazon India — I received product fake /first copy

Address:	Pune, Maharashtra
Website:	Amazon.in

I ordered a speedo endurance swimming brief costume prepaid the amount of money with including delivery charges. And received a product totally fake which don't even deserve 100 rs! I'm so disappointed. They say the product is non returnable now when i received it, before i buy it wasn't showing it's non-returnable it's kinda trap. But how can they cheat a regular customer. Please help is it's a big loss. I bought it with 699/- product price and + 70/- total 769/- and it's i realize i wasted all of my money please help for a replacement or refund at least thank you