howto call the categories from the product taxonomy (woocommerce)

My problem, I can’t call the categories from a woocommerce shops. I know that these categories are special terms. I am using a plugin that can do a chain select.

<a href="https://www.ads-software.com/plugins/category-ajax-chain-selects/">

This plugin works fine, if you call the standard categories from wordpress like this:

$taxurl = get_option( ‘category_base’ );

this snippet is used to build a link to the category.

The taxonomy for the shop is called product_cat, but whatever I try, I can’t catch the the categories to build a path. What I am doing wrong? What function can I try to get the categories from the woocommerce shop?

This is the complete function to understand my problem.

function chainselect_init($tax, $level, $titles, $labels, $btn_text, $exclude, $count) {

	 echo "<div id='chainselect_wrap' class='$tax cs_count_$count'>";

		 $categories = get_terms( $tax, array('parent' => 0, 'exclude' => $exclude) );

		 if ($labels) {
		 	echo "<label for='chainlist_1'>$labels[0]</label>";
		 }
		 echo "<select id='chainlist_1'>";
			echo  "<option>$titles[0]</option>";
		 foreach ($categories as $cat) {
			 if ($count == 1) { $cat_count = " ($cat->count)"; } else { $cat_count = ''; }
			 echo  "<option id='$cat->slug' value='$cat->term_id'>$cat->name$cat_count</option>";
		 }
		 echo "</select>";

		 if ($level > 1) {			

			for ($x = 1; $x < $level; $x++) {
				if ($labels) {
					echo "<label for='chainlist_". ($x + 1) ."'>$labels[$x]</label>";
				}
				echo "<select id='chainlist_". ($x + 1) ."' disabled>";
					echo  "<option>$titles[$x]</option>";
				echo "</select>";
			}

		 }

		 <strong>$taxurl = get_option('category_base');</strong>
		 $siteurl = get_option('siteurl');

		 echo "<input type='hidden' id='chainselects_taxurl' name='chainselects_taxurl' value='$taxurl' />";
		 echo "<input type='hidden' id='chainselects_siteurl' name='chainselects_siteurl' value='$siteurl' />";
		 echo "<input type='button' id='chainselects_submit' class='$tax' value='$btn_text' /><span id='chainselects_loading'></span>";

	 echo "</div>";	 

}

https://www.ads-software.com/plugins/woocommerce/