Board Thread:Game Discussion/@comment-212.106.185.49-20180328082354/@comment-27798333-20180328193926

If you were in fact signed in to your Google acct for saving progress, you can get it back, eventually.

Signing into Google within the game is not automatic. YOU have to do it in the settings page. You can choose Google, Facebook, or another thing I'm not familiar with. If you did not choose one of those, you were only playing as a guest. If that's the case, I doubt much can be done.

On the bright side, you were only at level 40. You can get that back in a day.