Lost most of my stuff

It happened on December 30, 2019. At somewhere around 3-4 PM. I lost my world templates, marketplace purchases, mine coins, and every time I refresh Minecraft it would sign me out of Xbox live. Some of my settings keep getting reset whenever I go back to Minecraft. The photo shows that there's only my worlds and resource packs in my Minecraft storage. I was also in the files app, deleting stuff I think I didn’t need. Username: SophisticChaff3 but now every time I sign into Xbox live it would just keep my name as “Steve” and in worlds/servers I have my regular gamertag. If there’s a way to get all those back using files & documents app I’d be happy.