Amazon India — Replace or Return Issue

Website:

www.amazon.in

I bought a product(Yepme Women's Blue & Pink Tops YPMTOPS0667_M) form amazon website, but instead of this they sent me another product(Yepme Women's Blue & Pink Poly Cotton Tops - YPMTOPS0666-$P), now when I wanted to just replace the item but they are not providing me such option of replacing, they are giving me option of return only, and for return purpose they don't sent anyone for pickup, they are saying to me that I have to self manage for returning their product by courier or etc, since I am not living in my own city, I live in another city in hostel how can I manage this, then why I am buying online products, I talked to their representative but he didn't respond well and doesn't give any perfect solution regarding my issue, he said it's not their issue, if it's not their issue then how and where should I contact. please do the needful.