Hello You Wonderful Yo,
Website has been mis-managed for years, person who registered with www.ads-software.com is no longer with the company.
For the record, your website is not “registered with www.ads-software.com” in any way. At best, the person might have come to www.ads-software.com, downloaded the WordPress software, and installed it on their own hosting server… but that’s all. WordPress sites are not “registered” with www.ads-software.com in any way, and www.ads-software.com has no control over your website.
To be able to revert the site from HTTPS or HTTP, you’ll need to first access your hosting company’s control panel. Once you have access, follow one of the options on this page to effect the change: https://www.ads-software.com/support/article/changing-the-site-url/
(Note that rather than changing HTTPS to HTTP, it might be better to instead fix the problem with HTTPS so you can keep the secure version of the site running.)
From a public analysis of your website, I can see it is using Google Cloud’s name servers, so it appears to be hosted with Google Cloud. But the server IP address returned belongs to Incapsula, so it also appears to be using Incapsula’s CDN or WAF… so this HTTPS misconfiguration could as well be happening elsewhere outside your WordPress website and server. Both Google Cloud and Incapsula are paid services, so you can always follow the money trail to find out who can give you access to your control panel.
Good luck, and stay safe!