kalieg2016 Does Island Paradise show as owned and installed under Sims 3 > Manage > Manage add-ons? If not, where and when did you buy it?
The other "packs" you mention are Sims 3 Store worlds and need to be installed through the Store site. You can download them from your purchase history (Store > My Store Account > Purchase History) or from their product pages.
https://store.thesims3.com/worldProductDetail.html?categoryId=12642
If you can't install from here, please describe in more detail what happens when you try.
I attached some images. Basically I install new worlds, Riverview and Hidden Springs, they say they have been installed, then when I go to play the game they do not show up.
