As long as you're emailing the guys at the mag, you're essentially doing it right. Basically for the most part, prizes are often held and distributed by a third party. PCG run the comp, then tell the company the details of the winners, and the company sends on the prize. However, if the company for whatever reason isn't prompt or whatever other reason, sometimes doesn't send out the prize, or otherwise. Unfortunately, at that point they rarely feel as if they're under any sort of obligation to tell PCG that said prize didn't yet get through to the recipient. So in respect, if you don't receive a prize, you should email PCG to let them know, and they in turn will chase up with the promoter of the competition - using the Fierce Attack Grues if necessary - and sort it out, even if it means putting you in direct contact with the competition promoter to facilitate the Prize Deployment 3000(TM) system.
Keep an eye on this thread, as one of the team may be able to help you out more specifically by getting you to email their specific address - although if you want to PM one of them I'm sure they can put you through to the person in charge of this sort of thing. Although make sure you PM a member of staff from your relevant mag - US can't really help with UK and vice versa.
Last edited by The_B; 07-26-2010 at 12:35 AM.