2 bugs, unable to down add-on and unable to resign in my Xbox account after reinstalling mc

I lost my mc account because of this bug, I can't sign in because after reinstalling Minecraft bedrock to see if I could fix something I can't sign in again it leaves my account to a steve or Alex account, and the 2nd bug I found was that I can't download add-on from MCPEDL, the option of open in Mc doesn't pop up which led me to reinstall Minecraft bedrock and now I can't sign in my Xbox account because of this bug.... I lost my Mc account and my microsoft account can't sign in as well.... and I lost all my progress and worlds....