WooCommerce Nested Product Subcategory

Hi, everyone!

I have one parent product category – “Balls”
and two subcategories – “For football”, “For Basketball”

Parent category shows all products and I have to separate these categories with their titles. For ex:

PARENT CATEGORY – Balls

For Footbal

<ul="products">
<li></li>
<li></li>
and etc.
</ul>

For Basketballs

<ul="products">
<li></li>
<li></li>
and etc.
</ul>

I use this part of code that displays the title, but when put it to loop-start.php after <ul class=”products”> it shows only title of the first child category

<?php

        global $post;

	$terms = get_the_terms( $post->ID, 'product_cat', 'hide_empty=0'  );

	foreach ( $terms as $term ) {
		$category_name = $term->name;

	}

	global $product;

	echo '<h2 class="sub-category-name">'.$category_name.'</h2>';
?>