That's a very long time for them not to contact you. Have you heard word since?
My brother came 4th(prize pack winner) a couple years back and didn't hear from them. When he contacted them, they said they emailed him the 'waiver form' and it must have went in to his junk mail.
He argued that he didn't get it(which he didn't, but junk mail deletes itself after 7 days, so he may have missed it).
They were hesitant as they have a one-month rule I believe, or maybe aweek. If you don't return your signed waiver form by the specific date they wont honour your money.
They did re-email the form(he got it in his junk mail), and then about 6 weeks later got his prize pack(hat, pack of cards, and something else...).
Good luck. I'd love to know how you made out with this.