Myntra.com — Pick up on hold

Address:	devkali
Website:	www.myntra.com

I ordered a shoes from Myntra x H &M
Yesterday I got the parcel..and the packaging was pathetic product was wrapped in some third quality of paper but that doesn't effected me..the problem is the fitting it didn't fit me well so I placed a return request on the same day it has all the tags and the product looks brand new..but when delivery executive came to pickup he said that you should have change the return subject into used product but why should i if the only problem was fitting..so he return back the parcel to me...so what should i do?