Category and Product Listing

It works fine on our end.

Please follow the tutorial there in order to create your menu:
www.hikashop.com/en/support/documentatio...splay-front-end.html

Yes. That will be simpler. You can use our contact form:
www.hikashop.com/en/support/contact-us.html

That's actually quite simple.

You don't have any products under your main category, that's why it's not displaying any products.

If you want to display products from sub categories, you need to change the option "sub element filter" to "all sub elements" in the hikashop options of your menu (you can find that screen via the menu Display->Content menus by editing your menu).

In your menu you need to select the category your want in the menu "associated category", on the same screen as the "sub element filter" option.

I created two links:
1 cateogry listing
1 products listing for one category

on your website. It's working great. Nothing special, I just did like explained in the tutorial:
create a new menu, select the type, enter a name, save, go in the hikashop options, change the associated category and save.