I don't know about your situation but I bought a ticket off a site similar to eBay for tickets (actually it was RAN by eBay, it's called Stubhub) and I got scammed, due to a fake ticket. We called them at the event in an outrage and they refunded us the tickets AND bought us new tickets so the concert was free.

But I would call the company you purchased from, because it's possible that they didn't know and that they can help you before the show.