Hi @cctrainer and welcome to our adorable Community 😊 I am sorry this happened to you. The boosters we collect are stored on our device's memory. This way we can reach them even if we are offline. Unfortunately, this means that we will lose all the boosters if we change the device or reinstall the game. We don't recommend storing a lot of boosters, it's better if you use them while playing the game. Here are some tips for safeguarding your boosters.
As for gold bars, they are stored on King' s servers and you shouldn't lose them unless you purchase any of the items. I will ask you to give me your game ID. If you don't know where to find it, follow the instructions below. Thank you.