lost my pvsz 2 username

I need help because earlier I played pvsz2 in my android phone, I got all the worlds the diamond plants the mints and sling pea, but then, after that I open my game but then when I open it all of my progress is lost and the game became new, my username is gone, but I log in my account in to be recover and I dont know how to recover can you help me? Because I spent lots of time, effort, days and money for that game