As 'MYoda' asked, Is it in your "My Penguin Magic" section.
Hopefully, you can view from there.
If not, recheck your packing materials and look for that card with the link again.
Still, if not, contact PM customer service directly by email.
You probably won't get a reply until Tuesday (Monday is a holiday here in the USA), but not to worry too much. They'll get everything fixed for you!
Bummer for the wait over the long weekend ;-(