When I first got the opportunity to get the T-Shirt I attempted to do it, but the site said the code was bad. I contacted Bungie, and I never heard back. Now I can’t get the T-Shirt any more... and I wanted to... How can I get Bungie’s attention?!
There isn't a way to directly contact Bungie. If you didn't save the code, you won't be able to order it anymore.