Sims 3 Seasons Serial Code Missing

Hi

I have most of The Sims 3 EXPs most of which I bought the game from a store not origin (including seasons) so when i had to completely remove The Sims 3 and reinstall all the games were saved on origin even the ones that wern't purchased through origin origionally so I only had to reinstall but for some reason seasons was not saved? Its no where on my origion account or ea account?
I register all my games and  codes but i cant see any sign of seasons anywhere!!

Is there a way of me retreving the code. I dont want to buy the Seasons expansion pack game again, not when Sims 4 is so close to release. 

Thanks