Re: I downloaded the free sims 4 and it won't let me purchase the expansion packs

@Mooganfreeman94

Do you have Sims4 base game?  Doesn't matter -  on the disc or from Origin.  All these additional packs are just extensions for this base game. So if you don't have this first released game, no extension pack will work.
Origin after checking your game library determines that you do not have this first base game and is blocking your purchase.
Quite recently there was a promotion and The Sims4 were distributed for free. Maybe then your friend downloaded the game so she didn't have to buy it. Now, unfortunately, you have to pay for this first base game: The Sims4

Maybe you confuse TS3 with TS4? As for TS3, you need a newer release of the base game than the first earliest to download the game.

I don't work for EA