I've the same problem, after I clear the Jurassic world (16/16) 2days ago, all of sudden I lost all my progress & plants including those bought with real money & the Halloween plants which is no longer available now. I can log in to google+, all my achievements still there, just all my coins/gems/progress lost.
I've back-up the game data a week ago using titanium backup, i can restore the data, but whenever I have internet connection, it automatically connect to google & replace my data with the 1 on google+ (which is 0 progress), thus losing my progress again. so is there any way to erase the progress saved on google+? I don't really give much hope on recovering my lost progress from EA team, I just hope that I can replace my google+ progress with my backup data.