Behappy1st Please load a new save, go into Build/Buy, and try to filter by pack. Let me know whether any packs you own are grayed out. The message would say "you don't own this content," but that just means the content isn't loading, not necessarily that your account doesn't own it. Please write down any packs that you know you own but that are grayed out. Double-check in Create a Sim as well; I believe some kits only contain clothing and hair, so checking in Build/Buy might not show them.
Next, quit the game, open the EA App, click Sims 4 > Manage > Manage add-ons, and go through the list checking for any packs that didn't load. Let me know whether they're listed as owned and installed here.