68424186988a895a It sounds like you may have registered your content on a previous EA account, if not in Origin then on the old Sims 3 site. You'll need to login to that account to access the content.
If you can't find that account, you'll need to contact EA customer support. First, take a photo for each pack showing the disc, its case, and the product code (clearly readable). You can upload these when you submit the help request.
I would strongly suggest using the live chat option rather than email. If you don't see it, try this link:
https://help.ea.com/en/help-contact-us/?product=the-sims-3&topic=missing-game&category=manage-my-account&subcategory=find-missing-game
Make sure you're signed into an EA site (this one is fine) before clicking the link and that the location in the lower-right corner of the browser window is set to U.S. or U.K.
Alternately, try using the help site without being signed in. Some categories of issue allow you to proceed without an active login, and many of those offer the live chat option.
On the other hand, if you have disc copies of everything AND the base game disc was manufactured prior to September 2012, you could in theory install the game via disc without needing the EA App at all. Let me know if you'd like help with the process. The base game disc's case should have a copyright date on the back, in the fine print.
