@MeganFord1213 The uninstaller probably won't recognize the files from those packs, so you'll need to delete them manually. And then you'll have to track down the hidden library files related to each pack; since you haven't been able to launch those packs, some of the files might not exist. Here's a guide to all the potential files you'd need to delete:
https://bluebellflora.com/manually-uninstalling-an-expansion-or-stuff-pack-in-the-sims-3-for-mac/
Be sure to delete whatever is left over in that extra Sims 3 folder as well. Then you can redownload the packs from Origin.