ok in some cases what can happen with the hidden springs Is you may be credited the simpoints which are for to actually buy the world hidden springs with since something seemed to have gone weird with yours only 500 simpoints i'd contact CS
if in the event you need to contact CS
1.https://help.ea.com/en/contact-us/
2.Click on the orange NEXT button
3.Select a platform
4.Click on the orange NEXT button
5.Select a topic and describe your problem in a few words
6.Click on the orange NEXT button
7.Click Chat Now to chat with a Game Advisor
guide on how to contact CS
http://answers.ea.com/t5/EA-Help-Beta/How-to-contact-a-Game-Advisor-using-the-new-EA-Help-page/td-p/...
FAQ http://answers.ea.com/t5/The-Sims-3-Store/Guide-Sims-3-Store-Worlds/td-p/1589911
from the FAQ
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.
