Origin errors are typically caused by either a mismatch in DNS records or the SSL setup between your original setup and the Ezoic setup, or by the host or a security layer blocking requests going via Ezoic servers. I am not sure which site you are referring to so i cannot take a look.
There are a few things your can try to resolve this here is a guide: https://support.ezoic.com/kb/article/how-to-fix-origin-errors.
You should be able to contact the support team using these Guidelines: https://support.ezoic.com/kb/article/guidelines-for-contacting-support
As you have mentioned you are unable to do so I have opened a ticket with them to help you with this.