Bought hidden Valley from EB Games

hidden springs ?

you redeem the code in your the sims 3 account then once the code is redeemed successfully go to your purchase history to download the items then install them once downloaded

1. Go to thesims3.com and log in with your account
2. Go to your account page: https://store.thesims3.com/myAccount.html (site will ask for your password again) 
3. Click on Redeem a Code 
4. Enter the 16-letter code, accept the Policies and click on Redeem
5. Go to your purchase history to download the world (make sure your game is updated to the newest version)

OR

1. Go to thesims3.com and log in with your account
2. Go to the general redeem a code page: http://www.thesims3.com/incentive/generalredeem.html
3. Enter the 16-letter code (this is not for 20-letter codes) and click on Submit
4. Go to your purchase history to download the world (make sure your game is updated to the newest version)

FAQ store worlds and how they work including common issues  http://answers.ea.com/t5/The-Sims-3-Store/Guide-Sims-3-Store-Worlds/td-p/1589911

edit to add

Hidden Springs

The world can either be bought through Origin or as Code in a box in a retail store.

Hidden Springs is probably the most difficult to redeem if you bought the disc version (available also in the world bundle). The retail version does contain a disc but there's not much on it (the world sure isn't).  To make it even more confusing, when redeeming the code or going through the install process, for some the world isn't added to your purchase history but you get Simpoints credited to your account. You can then use to those to buy the world here: Hidden Springs. It doesn't matter that it says it costs 2000 SP on the page. If you got 2450 SP credited, that's what it will cost. The disc version is only for the world, there's no extra Simpoints. You can also only use those for the world itself and not buy something else.

There seem to be disc version around that give you a code that add the world directly to your purchase history. So if you don't get Simpoints, check there.

I'm unsure how the Origin version works but you might be getting points credited to your account as well.