Switch from expiring up-to-date Norton 360 to Norton Security

Dialogue boxes can’t seem to lead me to destination: a renewal with Norton Security installed.

In the past, I might be able to uninstall Norton 360, download a trial Norton Security and install, enter the product key, and I’m on my way moving forward.

My Norton Security product key can’t renew Norton 360. Clicking on a link to chat led to a “Failed loading page”.

How do I get around these roadblocks?