Get the id of a WooCommerce category, by name

I have a wp template that I would like to assign to some pages. The template would ie. display all WooCommerce products that have the same master category name as the pages name itself.

By far I have tried using this code, but with no good output:

$idObj = get_category_by_slug($pagename);
$id = $idObj->term_id;
echo ": ". $id;

Unfortunately, the echo does not display anything.
Echoing $pagename works, and returns me the slug of the page.

Any good way I could make this work?

via Chebli Mohamed