I had a quick look at your accounts, and I can see the domain benmakesmedia.wuaze.com has already been deleted from your account. So if you’re still using the domain in your code, then that’s why.
From here, you can either add the domain to your account again or use a different domain on your account. I see you have added a custom domain to your account too, but that domain is behind Cloudflare and doesn’t appear to be linked to our hosting.
So best I can tell, you don’t have any website that’s actively hosted with us, so there is no way to access your PHP mail form.
Please note that you may want to use your custom domain or a subdomain of that domain for this and host it behind Cloudflare. Because we have a browser validation system that will block direct form submissions from other websites.