Today happened to me too! 😬
I've opened PVZ2 to play it, and there were no profiles at all! I haven't done nothing on my smartphone prior to that. Just played the game, closed it, and after I've opened it again 2 hours later there was nothing!
I had all the worlds completed, almost all the plants (only few premium missing), around 800 gems and 340.000 gold, and my plants were all well upgraded with seeds.
I've contacted EA, but probably I will wait a lot for the answer.
Do they usually recover accounts? I've spent too much time and real money on the game to just start it from the beginning! 😳