I just purchased a GT-AC5300 router from Amazon. They sent me a 20 digit code with dashes in between every 4 letters. Within the email, they had a link to http://www.callofduty.com/bundle. But that link accepts a 13 digit code. I've even tried entering the code here as well https://promotion.asus.com/en/promotionform/codbo4/step-1. No luck. Activision what is going on!!!! How can I receive a valid code?