WordPress fix Writing one link but showing another

WordPress Speed Up Service | WordPress Website Maintenance Packages

Writing one link but showing another, by Prolet

Hi,
I spent a lot of time adding a button to a page on https://pumpkinads.co.uk
When update the page and click on the button it takes me to https://articulatedmedia.com with a message for an internal server error 500.
How can it be? All other links on the page work perfectly well, only this one doesn’t even though it is freshly written every two minutes.
All cache and cookies cleaned.

Writing one link but showing another