You have to contact EA help, no way around that. If Live chat is not an option, switch country to United States at the bottom. Or try Twitter support during their work hours. They are really fast: https://twitter.com/AskEASupport
Usually From Ashes becomes de-authorized when they issue you a new "Online Pass (N7 Collector's Edition)" if you own the CE. Somehow they are connected. Just ask them to re-authorize it for you.
I have just the standard edition and the live chat could not help me for reasons I still don't understand. Part of the problem is on EA's side thier computer shows that I never bought it while when I look at my add ons page on Origin is shows I do own it. Now I have to wait on the phone which I doubt I will even get through today since my wait time is a staggering 800 minutes. I am not a happy person right now.
**EDIT**
Calling in got it fixed. Sounds like the fix was the same as it was for others in this thread. I know it is a hassle but my suggestion would be to skip live chat and go straight to calling them. It seems like the advisor I talked too on the phone had more information about my account that the live chat didn't have though I don't know that for certain. One other thing if you do call and you hear the wait time is something like 800 minutes don't get discouraged. My wait time was only 90 mins. Yeah that is a long time but nothing like 800.
