And I don't see it as a Completed Listing either.
Never mind.
Go to your Paypal account and look for your payment.
There is a ResolutionCentre on PP as well, and they offer very strong Buyer Protection.
The RC is on the right side of your transaction page.
Go to Report a Problem, find the problematic payment, and continue.
It's pretty straightforward, but there are deadlines so act now.