Can i get expansion packs for free if i have them?

@arino444chka  If you register the packs in your Origin account, then yes, you can download them for free.  You need to use the same 20-character code, printed on the back of the insert inside each CD case, that you used when installing the disk copies.  The packs will not appear separately in your game library—you need to click on the Sims 3 base game icon, then select More > Expansion Packs (or Stuff Packs) to see them.

If you try to register the codes and Origin says they've already been used, please check your library to see whether they're already listed as owned.