It only lets me play the minecraft java demo with minecraft purchased several years ago.

 bought minecraft several years ago, I am a fairly experienced player but since Thursday I have a very strange problem that I am not the only one that happened. When I open minecraft besides telling me that I have no connection even with internet I get the button to play ''demo'' when I am a player for several years and obviously I have the game purchased, I uninstalled and reinstalled minecraft, I logged out and logged back into my user and read everything there was in the microsoft support but I can not solve my problem, any ideas please (sorry if the description has spelling mistakes, I speak Spanish and I'm using translator).