Unfortunately at this point in time Mini Motor Racing game data and progress is device specific sadly, once lost, career cash and progress cannot be restored. Game data and progress is also device specific and cannot be transferred between devices. There is no way for us to backup or access a users individual game data as we do not host this information which is why we cannot help restore your lost data. I'm sorry to report the bad news. We hope that in the future for mini motor racing will have our own servers so we can have more control over these sort of things.