You need to change the CSS for ol.comment-list and possibly the CSS for ol.comment-list .comment . The CSS on your site may be less specific than this. For example, it might only use the class .comment-list to target the comment list.
One change you could try would be:
.comment-list {
list-style: none;
}
This should remove the numbers from the left side of your comments list.
To use the plugin with pages, you need to select both ‘post’ and ‘page’ from the ‘Post Types to Publish’ setting. That setting is found on the Publishing Settings tab.