Product key for The Sims 3 Ambitions not working as it has 'already been activat

@SweetStarSage733  You'll definitely need to contact EA customer support for help.  Try this link:

https://help.ea.com/en/contact-us/?product=the-sims-3&platform=mac&category=manage-my-account&issue=find-missing-game

The page should already have selected Manage my account > Find missing game, but if not, choose those categories.  Live chat should show up under the email form.

It's also a good idea to take a photo showing the Ambitions disc, its case, and the product code; you can upload this to the form when you submit the live chat request.