Cant remove Comment Box

this will have effect only for posts and pages crated after the change;

try:

dashboard – pages – all pages – click ‘quickedit’ below the page title(s) – untick ‘allow comments’

in extreme (if you never want to have comments on static pages), create a child theme, and edit page.php to remove:

// If comments are open or we have at least one comment, load up the comment template.
					if ( comments_open() || get_comments_number() ) {
						comments_template();
					}