World Adventures not on EA App

I bought the Sims 3 World Adventures on disk about 15 years ago. I had it installed on my old computer and activated the code through Origin. I haven't played much since Origin was done away with but decided to boot up the game. I tried to take a vacation with my sim and noticed that I was unable to due to World Adventures not being installed. I tried to go to my packs to install it, and it is not showing as a pack that I own. All of my other expansions are showing and World Adventures is not the only pack that I physically bought. I flat out refuse to repurchase this (especially when they are charging this much for a 16 year old expansion pack) so how can I resolve this issue?