RE-installing sims 3 game

Try this first.if you've registered the game on Origin or on thesim3.com (if your accounts are connected and the game shows up in myGames), you should find the code on Origin. In your case,you need to make sure it it the right account .

Right click on the game and choose Show game details. The code should be there

If you lost your serial code and don't have the game installed on an old computer, you need to contact EA live chat.

If you registered your game to your account, it should be easy to get the code. If not, they'll give you a new code if you can proof that you own the game. See this: Obtaining a Replacement Registration Code

1. Click the link https://help.ea.com/en/contact-us/ask and log in with your Origin name and password.

2. Where it says: ’What Can We Help you With’, type in ‘GAME NAME’

3. Click Find Solutions

4. Select "Your problem,eg accounts" from the drop-down list and also select your platform from the list.

5. Click: Find Solutions

6. Scroll down a little and on the lower right hand side, Click "I Still need Help"

Picture to help you understand better,  https://help.ea.com/article/welcome-to-the-new-and-improved-ea-help-center

If live chat is gray, change your country to US and make sure you're on US Business hours. It might also gray because they're very busy. Try later.

The Window Will Open...
You’ll now see the currently available contact options(Depending on your game). These may vary depending on your geographical location and the time of day. Phone or Live Chat are the best options.

For customers in North America:

• Select "Call me."
• Enter your phone number.
• Select "Submit."

For Customers outside of North America:

• Go to the "choose a contact method" section
• Contact us using the telephone number provided within the listed opening hours

Please be aware that it is likely that the agent you speak to will need to confirm your personal informations on this account.

Hope this helps
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***Please note...I do not work for EA/Origin. Questions belong in the forums,Solution is like medicine,same medicine/solution may not work on same problem.I'm helping you because I'm also a victim of EA for releasing their half baked products to us,gamers.

I don't answer questions via PM.  AHQ is "Player-to-Player" technical self-help forum