Hey Carole -- I had a similar issue to yours. I wanted to unpublish my landing page but there's no option to do it so. I tried deleting it but after doing so, it's still reachable through the previous links. You actually need to request this from their tech team as archiving them will not remove them from the web. You can reach CK's support here: https://convertkit.com/support40

Robert
Free Diver | Adventurer