Sims 3 code already redeemed

@DinaCRO  Is it possible you previously redeemed the code in Origin, or maybe on the old Sims 3 site ( www.thesims3.com or store.thesims3.com )?  If so, the game would already be in the Origin account tied to whatever email address you used at the time.  Please check your current Origin game library, just to make sure the pack isn't already there.

If you do have two accounts, you can ask EA customer support to merge them, although the account that disappears will likely lose the store content it owns.

https://help.ea.com/en/contact-us/

To get more support options, you can always change the location in the browser window.  Just pick a country whose language you're comfortable writing in.  Phone calls are currently unavailable, but live chat is open from 9 am to midnight GMT.