The revision of the code of Woocommerce

There is a code that displays on category pages of Woocommerce store child sub-categories (screens in attachment). Live you can look here
The problem is that the categories that have no child, displays a list of subcategories with an empty seat.
Need code to add the condition that in the absence of child subcategories code is not displayed.
Interested in the timing and cost of the work.