SEO "Free landing page for agencies" does not change

It's been 6 hours since i bought a PRO plan, and changed the seo of a landing page to a different name and description, but the browser still says "Free landing page for agencies".

What can i do to change it, or how long does it take for it to change?

As i already said, my website has a PRO plan, which i bought 7 hours ago, and i changed the SEO multiple times 6 hours ago

EDIT: I have tried to open this website in multiple browsers, and also in a virtual machine, same result