Sorry but this isn't going anywhere, and no-one here can help.
Contact the Police, they are your only real option.
In the future, do not blindly EFT money to someone that you have not seen/known. That's just silly.
I mean would you walk upto someone random person in the street and give them $500 and tell them to give you something in a week - when you have NO other details? Sounds kinda silly now doesn't it? As that's exactly what you have done.
End of the day, buyer beware. Bet you are kicking yourself for not driving 2 hours.