Can't find Sims 4 files on Mac

Okay, so this is a weird problem.

Yesterday I purchased and downloaded The Sims 4 to try it out. (I would have used the trial version and saved myself this headache, but the trial isn't available for Mac.) I was disappointed with the limited map and I don't really care about the improved graphics, so I returned it under Origin's great game guarantee and received my refund. I thought everything was taken care of... BUT now I have 14+ GB of Sims 4 data somewhere on my computer and I can't find it to delete it.

I know the files are somehow still there because I checked my available storage before I downloaded the game and it's about 14 GB higher now, so the downloaded data is obviously still somewhere on my hard drive. I've tried searching with Finder and I've checked all the obvious folders (Applications, Application Support, the Electronic Arts folder in Library) and while I found the save files from the brief time I spent playing the game, those totaled less than 1 GB.

I'm generally pretty tech savvy but this has me completely stumped. I can't uninstall the game through Origin because I no longer own it. How do I find these files so I can delete them and free up that space on my hard drive?

Thanks!

J