Problem with Creative Cloud serial number
I go to Sheridan College, and my program gives every student a 1 year subscription to Creative Cloud. I was on campus when I entered in my redemption code, and was then asked to add a credit card to my account in order to activate the membership. I didn't have my card on me, so I put my laptop to sleep and went home. When I got home, the page reloaded, and when I re-entered my serial number, it said that it's already been redeemed. Now I can't download Creative Cloud.
What should I do?