Here are the screenshots of my ACF Custom Fields.

Here’s the ACF code I used on this page template.

I highly recommend purchasing the plugin ACF Theme Code Pro.

<?php if ( have_rows( 'instagram_post_repeater' ) ) : ?>
    <?php while ( have_rows( 'instagram_post_repeater' ) ) : the_row(); ?>
        <?php the_sub_field( 'instagram_post_url' ); ?>
        <?php the_sub_field( '' ); ?>
    <?php endwhile; ?>
<?php else : ?>
    <?php // no rows found ?>
<?php endif; ?>