Comments not appearing under post

Hello I am having a very similar problem, I cant make the previous comments appear under my post, I have read up on this greatly and one thing I did find was to insert

<?php $withcomments = 1; ?>
<?php comments_template(); ?>

in the Main Index but this still doesnt seem to work, my sites https://www.studentspayless.com would appreciate any help that I could get

Thanks alot