My game is working. I came back to tell the solution that worked for me in case it helps anyone else. Troubleshooting makes me want to die and is very hard while I'm crying so if it helps even one person, I'll try.
Original situation from yesterday: "I did NOT pre-order. I bought the game 3:44pm and it's now 7:32pm; you have my money, but I don't have my game. I ordered through this new EA app, the same way I always ordered through Origin; I don't have any physical copies nor used any other vendor. My order status is Completed and has been that way for hours. I've never seen a pending status and I have no options to cancel the purchase. The pack says "installed" under Manage Add-ons, but the content isn't in the game. I also watched it download after I purchased the pack and updated the game. Within the game it still says I need to download to use. I have restarted this EA app multiple times along with my game. I've followed years old tutorials for deleting the cache. I've read dozens of pages trying to find my exact situation. What is going on? !? This is ridiculous and I'm beyond angry."
Solution step by step (on PC):
1. Sign out of EA App and close it
2. Go to Task Manager and kill EA Background Services (I think that's the name, but it definitely says EA)
3. Uninstall EA App
4. Go to http://origin.onl/download/ and install Origin
5. Open Origin and log in
6. Wait. EA App puts a pop up over Origin, so I couldn't interact with it at all. While waiting, my games library downloaded and updated everything. There were 2 overriding popups during the downloads. They were for user agreements on 2 different games, agreeing to them didn't make the EA App start anything, so it was okay to click them.
7. Wait until the download manager stops.
8. Click that EA App popup to download that program. It will uninstall Origin and install itself.
Absolutely everything looks the same as the last time I was in the EA App, but now I have the EP. In the game, it says Owned, instead of Download to Use. And I have the Growing Together CAS items. I'm not sure if I have any other issues in game. My PC is very old, so I had to shutdown the game to set up my disabled packs anyway (I improve performance by disabling some packs every time I play). Good luck, guys!
