Missing or Invalid CD-Key/Product Code problems will require an EA Game Advisor to resolve. They are the only ones who can look under the covers at your account.
They can be reached through the Help Center.
After getting to the Help Center and filling out the required information, (Product/Problem/Platform)
look for the "Chat Now", "Call Now", or "Email Now" buttons, not the AHQ "Ask Now" one. (You've already done that!)
The options you see may vary depending on your region and the time-of-day.
If you select "Chat Now" or "Call Now", be sure you have enough time (at least one hour) to wait before being connected to someone. 😕mileyfrustrated:
Good Luck!