Myntra.com — Wrong product and not accepting my exchange request

I ordered Puma women shoes(UK 6) on 5th Dec and I recieved wrong product (kids shoes)...now Myntra has put my exchange request on hold just because I don't have the original product ...but how can I return them the original product if I didnt recieve it...and I dont have any update...I have talked to customer care 4-5 times in 3 days but haven't recieved any update..it is still showing"your product picture doesn't match the original product"