Arianera To get a refund, you'll need to talk to an EA customer support rep directly, but I would strongly recommend live chat rather than email because a real-time conversation is much more likely to be successful. When you don't see the option, the thing to do is to try a different category of issue. Or you can try using the site without signing in, which is usually an option if you're not already signed in.
For the white screen, does this happen in a new save too? If so, it's almost always mod-related, T.O.O.L. in particular. If only the current save is affected, try reverting to a version of the save from before you installed the pack so that the world (hopefully) loads properly this time around.
https://sims4.crinrict.com/eng/2014/09/recover-backup-save-game/
GameGirl2168a Simply changing your username should never delete your data. But if you create a new account with that username, then it wouldn't have access to the data from the old account. I also notice that there's a gamegirl2168 on this site as well, and you could probably have your two accounts merged by contacting support.
I say "probably" because ownership of some games blocks merging (Apex Legends is one), and because some content doesn't transfer. But Sims 4 packs should all transfer fine. The problem is limited to in-game purchases (Sims 3 Store content, coins/shards/etc. for competitive games) and some very old games that can't be added to accounts anymore.
