There's a user here with the name "huntingguide
" but there's no guarantee that's the person you're dealing with. I guess you can try e-mailing him through the site, but he hasn't logged in since mid-March so I wouldn't hold my breath waiting for a response.
I would think you need to gather up your Paypal info from the transaction and then ask one of the mods if they can help you out.
Edit: You may wish to look at this thread.