How do I download the Sims 4 after purchasing it with the code i bought?

@xQueenCatx here you can find a guide, hopefully that helps you:
https://help.ea.com/en-us/help/origin/origin/origin-code-redemption-faq/

Let me know if it doesn't.

It doesn't come up with that option ☹️

@freyaxrose If you already have an activation code and have a pc you need to download Origin from EA and install. Origin is the DRM for this game ind is required to play this game. Once Origin is installed and you login (or create an account and then login) you can redeem the code you already have. If the system accepts the code the game icon should appear in the library section in Origin. From the icon you can install the game and start the game.

@freyaxrose 

What option do you referring to?

Its a website that is used to downlowed sims4

@2012894 

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2012894 wrote:

Its a website that is used to downlowed sims4

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If you downloaded the game from a website you probably downloaded a pirated copy.

You need the EA game client Origin to download the game if you purchased it on the Origin website.