Sims 4 limited edition installation

Ok so, I got the Sims 4 limited edition December 25, 2014 and when I tried to install the game it wouldn't work. I tried many times and then I figured it was my computer (I have a 8.1 Toshiba laptop) so then I just gave up and continued to play my Sims 3 collection. Then today on June 26, 2015 I tried again and realized that I had to type in the game I bought in Orgin and press purchase then it will give you the option to put  the promo code in. The problem for me was that the Sims 4 limited edition game was  not an option on Orgin anymore just all the other versions of the game(such as Sims 4 Deluxe Edition).So my question is do I have to buy the game again to play or can I type in the limited edition promo code into another version of the game. (Someone please help me!)