We're really sorry to hear that you have experienced this issue, we completely understand how frustrating it can be to lose progress.

Unfortunately, there is no way for us to retrieve lost data as everything is stored in the cloud by Google or Apple directly.

When reinstalling the game or installing it on another device, it is necessary to make sure that you are connected to your cloud account in-game and wait until the synchronization is complete before playing as it can otherwise overwrite your previous progress. 

Sometimes, there can be unfortunate bugs with the synchronization that are sadly out of our control since everything transits through the cloud and is stored by Google or Apple, but most of the time the progress issues happen because the synchronization was not complete. 

If you encounter an issue with the game, we do not recommend uninstalling the game right away. The best thing to do is to first try and clear cache from the store and from your device then reboot your device (turn it off and wait five minutes before turning it back on) and try relaunching the game. Before trying to reinstall the game, you can also contact us directly and check if there are known workarounds for the problem you have been experiencing.