I got a code the other day, and when I tried to enter it it worked! It said I was going to get the item, then it said the code invitation was already used. I asked my friends that owned this item the code, and each of them said the same thing. If they entered the same thing, why didn't mine work?
You can easily resolve this by contact Mr Lincoln. He will sort out the code problems. Go to the Help & Support tab on the left and use the Contact Us tab.