Hi,
I don't see the problem on your website.
When you click on your second level category, you arrive on the listing of the sub categories of that category:
take.ms/gMBhL
And then, when you click on that sub sub category, you arrive on the listing of the products of that sub sub category:
take.ms/mVVHR
And here there are no products, so the listing is empty.
That's how it's supposed to work.
If what you want is the modules on the right side to update based on the currently selected category, you want to turn on the "synchronize" option of the modules. That way, when you click on a second level category, the listing in the module will display the third level categories after the refresh of the page.
But if you want a full dynamic tree accordion categories listing module, then you can do that with the module available by default with HikaShop, and you would need something like that:
extensions.joomla.org/extension/skyline-...cordion-for-hikashop