Re: My Sims 3 Steam Code isn't working
@MeowHorse13 Once the Steam copy of Sims 3 is showing in your EA App account, the Store should work too. Does Sims 3 show up in your EA account because you previously registered it from Steam, or because you own a separate copy? If the former, then I'm not sure why the Store isn't working, but also, you won't be able to register your Steam code a second time. If it's the latter, then yes, you'd need to add your Steam code to the EA App, so the problem is not with the Store or your account but the code itself.
At any rate, you'll need to contact EA customer support to ask what's wrong with the code. Take a screenshot of your Steam library showing the base game CD Key, and upload it when you submit the help request.
https://help.ea.com/en/contact-us/
I'd strongly suggest using live chat rather than email. If you don't see the option, change the location in your browser window to U.S. or U.K., or choose a slightly different category of issue.
And let me know if you don't get anywhere with support.