Put this on "Report a Scammer" At the VERY bottom of the sythe forums, If you have pictures ETC. But I'm not sure if you'll get your money back. But you could help other people get saved from getting scammed.
If you Paypal was funded by a Credit card then contact them. Tell them that you did not receive the item which you payed for. They should help you out. If you didn't use a Credit card then you have to email/call paypal and tell them the situation.