Flipkart — Delivery boy not accepting the the product

I have placed order for reebok full sleeve shirt but due to poor quality and their are lots of stained dark spots i raised a request for returning the product. Return order is accepted by you but delivery boy did not accept the product. He told me that product was used and there are lots of dark spot.
I didnt even wear it that product. It is impossible to make it dirty within 1 day. The size is also too large.
As i am placing lot of order from flipkart and also received good service but this time i am not getting proper service from your side.
Request to instruct the deliver boy to accept the product and refund my amount at the earliest.