Deactivate related products in product listing

-- url of the page with the problem -- : mywebsite.com/mypage
-- HikaShop version -- : 2.3.0
-- Joomla version -- .3.0
-- PHP version -- :5.3.28
-- Browser(s) name and version -- : XXXXX x.x.x
-- Error-message(debug-mod must be tuned on) -- : Error_message

I can't find out how to deactivate related categories and related products in listing

The related products will only display on the product page by default.
I'm not sure what you mean by "related categories".
Please provide a link to the page with the problem, that would help us understand what you're talking about.
Also, if you can provide more information on the issue, that would help