Thanks try picking up a Draw Something!
1st and 3rd code used by someone else.
And the 2nd one is invalid.
Crossing my fingers for the next code drop :)
I went to the game section --> marketplace --> I found the "Car" add over there. Also able to get the Theme and Avatar item from it!
Just in case, you can also try refreshing the dashboard (home button -> then press "Y").
Hope that helps!