Okay so used Firefox to go on (somehow the shop looked really broken in firefox compared to chrome) I went on site I know for a fact I used to own but I only can see a green buy now button. It's like way back when Sims 3 was the thing I bought it all but the account I made back then would be the one I just got merged since it's the only I ever made before origin.
@Memi_0107_ I asked an EA community manager about this, and unfortunately, there probably isn't any way to get your owned content back. This article is mostly about other EA games, but it does mention Sims 3 downloaded content (click View more under "These games and services include, but are not limited to:").
https://help.ea.com/en-us/help/account/linking-accounts-and-persona-transfers/
So if the data about your store content purchases is gone, I don't think you can fix it. You could always try contacting EA customer support again, but I'm not sure they'd be able to help. I'm sorry I don't have a better answer.
