wiped world

My account information seems to have been deleted from my friends World, we have been building this world for years and I had lots of stuff, however it keeps starting me with nothing and in a different location to where I last saved, now this has been happening for approximately 4 months on and off where if I uninstall and reinstall the game it would reset and give me my stuff back and start me where I last savedbut this last time it won't do it, I have reinstalled it 4 times and I still start with nothing, also when joining it doesn't use my created character just the default one