On the main page of the support site
The link to “contact us” returns 404 https://support.zwift.com/contact/contact-us-HyOsyktEX
The link should probably go to Contact Us - Official Zwift Support | Zwift
@Paul_Southworth - Sorry for the delay here! It looks like the button on Support is working now. It should pop up the “Contact Us” box but I will have the specific link looked into