Myntra.com — return of nike shoes

I am not able to return the nike shoes i bought worth rs 7000 as they are not genuine nike. But it just exceeded 1 day against the return period and the customer care personnel is refusing to return and is very rude.
Its a matter of 7 thousand for me not a small amount.in first case they shouldn’t be this rude its a matter pf customer building
I am requesting for a call back but there is no one calling me back and they do not have an email id to send mail to