Go to >> Settings >> Discussion
Uncheck “Allow people to post comments on new articles”
For any comments that already exist, these will show in the posts and/or pages. WordPress doesn’t make it easy to disable all comments and options, so you would have to delete the comments so that none show up in the posts or pages. Then, for all new posts, comments will be disabled.
I’m assuming this is what you want to do then?
I went to look but you’re in maintenance mode… but if anything is still there, the only other method would be to add custom css to “display: none;” on anything that has anything relating to comments, or last resort, stripping out the code from several files.
I just found this plugin that disables comments….I just tried this in Preference and sure enough, it took out everything relating to comments.