Lost save

I don’t play 3 days , start today and I see “new game “ and my turtles is 0 lvl

Quit and relaunch the game until it gets your data

I don't know what with the game but the cloud fails to connect your data just vanishes.... It's weird because it should exist locally

It's a known issue:
Game Progress Not Saving

If you have quit the game for a long time, pretty sure the corrupted new save already saved to cloud, no way to retrieve the old save from cloud. For "No need for Mutagen!" (Bring all characters to max Power Level) achievement, I did it in one sit, it took around a few hours even you know the fastest ways to do it.....

I had this happen to me. Thankfully, it was OK after I quit the game (literally with the system "quit" button) and returned.

I hope my save is still there… I haven't played it for a while, and this is apparently a known issue 😥