The paypal dispute system isnt the quickest either .
I bought a new cosworth water pump on ebay, the company sent a pinto open type pressed steel impeller one instead, (even though on the ebay ad it was the correct closed impellor cast cosworth type in the pic) when I told them they said I had to send it back at my cost before they would send the correct one that was advertised, so I said for them to arrange collection of the incorrect item and then send the correct one as it was there mistake not mine, they refused so I opened a paypal dispute - that was over 2 weeks ago and still not resolved.
So the quickest course of action was you is probably just to wait until it arrives Im afraid