Lost entire Star Wars I

I performed an update to my Samsung Galaxy SIII yesterday, after it was completed I noticed my Star Wars icon was missing from the folder. The app was still installed on my phone. When I clicked on the app it opened and lo and behold it was if I had just installed the app, all levels were locked except Tatooine and of course I have to start at the beginning. I have never lost any information or apps before and I'm not sure what happened. Would the information still be on my device somewhere? Do I really have to start over? Any help would be appreciated.
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