Display Random Product under categories listing

Hi,

I would like to display random product under the categories listing page.
Categories Page

Shoe Shirt Jewellery

Then the random product from this three categories.
I doesn't want the heading of the product categories to display.

I want it to be something like this:

demo.hikashop.com/index.php?option=com_h...ng&Itemid=72&lang=en

I tried to make changes to the module but could not identify which part to make changes to it.
I only manage to display the page with the categories but not categories plus feature product.

Any help is appreciated.

Many Thanks,

JEannie