Selling unsecure domains

I bought a domain with a “site builder” page from Diamatrix, meaning my entire website and development program of the website and domain is with Diamatrix. With their help we “index” the website so it visible on Google. When I Google my website a “red” message appears stating my website is unsecure plus “The certificate for this site is not valid. Because this connection is not secure, information (such as passwords or credit cards) will not be securely sent to this site and may be intercepted or seen by others”. I immediately wrote to Diamatrix and they responded the following: “The "Unsure / Unsafe" means that your website does not have an SSL certificate. We can add an SSL certificate to your hosting package for an additional R25p/m, so your website can be "Secure". Alternatively, you can purchase an SSL certificate from the link below: https://www.domains.co.za/ssl/domain-validated-ssl-certificates”

This categorically means the domain and site builder Diamatrix sell is unsafe and unsecure. I suggest they must state this clearly on their website and invoice that : THE DOMAIN AND SITE BUILDER PACKAGE WE SELL IS UNSAFE AND UNSECURE

I can’t believe companies like this is allowed to operate, the least Diamatrix can do is sell safe and secure domain. Sicking.