Purchased Monte Vista, how to get it?

try this log into your the sims 3 account-my store account redeem code once you redeem the code monte vista should b then in your purchase history download and install the world once installed launch your game you will find monte vista in the +new game to start playing with it if for some reason you end up with an invalid code or used already message then you will need to contact CS

They can be found here: https://help.ea.com/contact-us
Choose a category, a game and a platform for the contact options to show up.
If live chat is gray, change your country to US and make sure you're on US Business hours. It might also gray because they're very busy. Try later.
See this post if you have trouble with the site: http://sims3.crinrict.com/en/2012/10/how-to-contact-ea.html