@myeungo Your command looks fine, unless there's a space before the - (I can't tell either way). Try clearing the EA App's cache:
https://help.ea.com/en-us/help/faq/clear-cache-to-fix-problems-with-your-games/
If that doesn't help, try running the App as an admin: right-click the desktop shortcut and select "Run as administrator."
If that doesn't help either, I'm a little perplexed; I haven't seen any other reports of this lately. But as a workaround, you could try deleting these packs manually. They're labeled exactly as in the command line argument, and they're here:
C:\Program Files (x86)\Origin Games\The Sims 4
You can ignore the folders inside Delta, which are patch data for the packs and not relevant here. Make sure you've disabled automatic game updates in the EA App. Close the App and kill the EABackgroundService in the Task Manager before trying to delete any folders.
If the App still tries to reinstall the packs, it might only do so once, but if it keeps trying, you can create text files with the same names, and strip off the .txt extensions, in the same location. The App won't be able to create folders with these names if the files already exist.