If it is the code for the 12 days, (quoted text from 12 days crown giveaway page) "This code expires at 11:59pm US Central Time on Wednesday, December 21st, 2016."
Sorry, but the code expired. All codes expired at that time. If it helps for next time, mark it on your calendar, put it on a to-do list, or set an alarm a few hours before so you remember to claim.