Have you tried opening a complaint with Paypal? I am assuming you paid through PayPal.
Here are the timelines eBay uses for complaints:
Timelines
If you haven't received an item, you can open a case after the estimated delivery date (if available) or 7 days after making payment (if no estimated delivery date was provided).
Good luck. Maybe it is hung up in the mail. Our mail is a couple days behind due to the holidays.