The eBayResolution Centreis at the bottom of this page.
You have 30 days from delivery to open a Dispute for Not As Described (not working).
If the scammer seller schmoozed you past that date, you still have 180 days from purchase for a Dispute with Paypal.
The PP Resolution Centre is at the top of your PP account page under Tools.
In both Disputes, you will be required to return the unwanted item to the seller WITH CONFIRMATION OF DELIVERY.
EBay will require the seller to pay for return shipping.
Paypal requires the buyer to pay for return shipping.