We have a couple of steps we'd like you to try to see if they resolve your issue:

Connect with Game Center or Google Play Games
If you've ever signed in with Game Center or Google Play Games  then you should be able to recover your progress by signing in again.
* Open Dan the Man
* Press the Settings button
* Select Google Play Games or Game Center and follow the prompts

If that doesn't work, please contact us via the in-game support chat.