I've tested blacklisting someone via cafe and for me, their messages no longer appeared. I recommend re-blacklisting that player and refreshing, and if the problem still consists don't hesitate to report it again. As for your tag, you most likely have it disabled via settings so I suggest you enable it, and if it's already enabled but your still unable to see it, disable then re-enable it and try refreshing just to be on the safe side. And if you cannot see your tag even while in village it's because of the new LGBT+ titles and the black lives matter title. Question answered, thread closed.