Woocommerce Categories loop with products

functions.php

$args = array(
    'type'                     => 'product',
    'parent'                 => 0,
    'orderby'                  => 'name',
    'hide_empty'               => false,
    'hierarchical'             => 1,
    'exclude'                  => '',
    'include'                  => '',
    'number'                   => '',
    'taxonomy'                 => 'product_cat',
    'pad_counts'               => false
);

$cats = get_categories( $args );
//var_dump($cat);
foreach( $cats as $cat ){

    $category_id = $cat->term_id;
    $category_name = $cat->name; //category name
    $category_slug = $cat->slug; //category slug
    $string = $cat->name; ?>
    <div class="shop-categories <?php echo $category_slug ?>">
        <a href="<?php echo get_term_link($cat->slug, 'product_cat'); ?>" title="<?php echo $category_name; ?>">
            <?php
            $thumbnail_id = get_term_meta( $category_id, 'thumbnail_id', true );
            $image = wp_get_attachment_image_src($thumbnail_id, 'large');
            if($image){ ?>
            <div class="featured-category-image">
                <?php  echo '<img src="' . $image[0] . '" alt="'.$category_name.'" />'; ?>
            </div>
        <?php } ?>
            <h2 class="cat-title">
                <?php echo $category_name; ?>
            </h2>
        </a>
    </div>
    <?php
    $args = array(
        'post_type' => 'product',
        'product_cat' => $category_slug,

    );
    $loop = new WP_Query( $args );
    if ( $loop->have_posts() ) { ?>
        <?php woocommerce_product_loop_start(); ?>

                <?php while ( $loop->have_posts() ) : $loop->the_post();

            do_action( 'woocommerce_shop_loop' );

            wc_get_template_part( 'content', 'product' );

                endwhile; ?>
           <?php 	woocommerce_product_loop_end(); ?>
    <?php }
    wp_reset_postdata();

    }