Is the seller in China?
You may have paid for vapourware. A product that does not exist.
Go to your Paypal account and open an Item Not Received dispute.
The first suggestion is to contact the seller, but while this is sensible and polite when you are dealing with a problem transaction, this is more likely a scam.
Skip that step.
(If your innate Canadian politeness won't let you, remember all you want is a refund. Do NOT accept an offer of a replacement which will never appear and do NOT close the dispute until you have your money.)
Ask PP to step in and escalate to a Claim.
State in the Claim that the listing has been removed by eBay. This usually speeds things up
If the seller cannot prove Delivery (not shipping, delivery) you will be refunded.
PP allows Disputes for 180 days from Payment. EBay allows claims for 30 days from the last estimated date for delivery.
