We're sorry to hear about that. Did you save your progress in the Cloud before? It is the best way to keep it safe if you switch devices or uninstall the game, as without the Cloud Save you will inadvertently reset all progress made locally, including in-app purchases. If you are switching devices, make sure to screenshot your Cloud Save ID in the 'Options' menu to prevent any loss.
Something that often works is:
  1. Turning wi-fi settings to off
  2. Restart your device
  3. Launch Hungry Shark Evolution and activate Cloud Save (see: "How do I use Cloud Save?" FAQ)
  4. Then try this exact method with your wifi settings turned on.

If this doesn't work, please contact our support team and we'll see what we can do.