Lay-out single product

Hi,

I’m building a website for a rental company. I bought the pro version of wp-catalogue to use multiple short codes. But there is one problem,
On the single products page i’m not able to use the themes page template.
What I would like is to have the navigation bar on the left to stay on every page.
Please help me out.

The website i’m building is https://www.tonca.nl/wordpress
A single product page can be found here: https://tonca.nl/wordpress/index.php/wpcproduct/bagagewagen-tonca/

https://www.ads-software.com/plugins/wp-catalogue/