Gift game code
@avconnelly There's no way to find a product code for a pack you purchase through EA. Even if you did find the code, you couldn't transfer it to your partner's account. Your only move here is to contact EA customer support and request a refund. Even though SimsDLC isn't usually eligible, support often does issue refunds in the case of a mistaken double purchase.
I strongly recommend using live chat rather than email in this case. If you're not seeing the option, try this link:
Make sure you're signed into an EA site (this one is fine) before clicking the link and that the location in the lower-right corner of the browser window is set to U.S. or U.K.
As far as gifting goes, you may be able to sign into your account on your partner's Mac and send them a gift. The EA App doesn't support gifting, as far as I've seen, but Origin still does, and there shouldn't be any problem with accessing multiple accounts on the same device as long as you sign out when you're done.
