Code showing up as not valid

I was trying to purchase sims 3 generations today and i've run into many issues!

At first i wasn't able to purchase it from origin. It would say :Your action cannot be processed." My card and account info is all up to date. So i logged out of origin and logged back in and tried a few more times, all sending me the same message after.

I then went and purchased the game for double origins price at walmart. I got the code and put it in and its saying its not valid. I tried redeeming my code on EAs website as well and its the same thing each time.

I followed all of the instructions exactly. My origin app is also up to date, i checked.

Someone please help or give me a solution if you have one! I'm going crazy over here. It should NOT be this hard to download an expansion pack, I have bought and successfully done this 3 times before!!!!!