If you decide to send a label, use this link:
https://www.paypal.com/us/cgi-bin/webscr?cmd=_ship-now
It's paypal, you can log in from there and create a shipping label for anyone at all. All you need is to print it on regular printer paper and it can be taped to the package.
Although I myself would wait for return of the item first and refund THEN............