May already be your customer? Need Help according to SiteGround

You are providers of a Theme Version, Kriesi, for my website, started in 2013. A WordPress autoupdate and a conflict with one of your Themes has destroyed my website, every page, every bit of content. I have been in contact with SiteGround and they suggest my conflict can be resolved by a Kriesi Enfold Theme Update. I am asking Kriesi support human beings to contact me directly, so I can try to bring my website back. I asked SiteGround to provide me with an email address to a human being because of this clusterfuck, and this contact form is the best they could do. We have such great companies now, they hide from their own customers. SiteGround support staff suggest this:
“As for restoring your website in a working condition, it will not be possible with the current application setting.

The core files of your application require PHP above 7.0, and your theme version requires PHP 5.6 or below, and both conditions cannot be covered simultaneously.

That being said, this should be resolved with a theme version update.”

Imagine you are a musician who teaches and plays and performs music and only wants to help people learn to play and sing, so decided to have a website. Imagine 10 years of work into teaching hundreds of people only to see your website destroyed by someone else, a tech company, software on autoupdates, somewhere, run by someone, for some kind of goals, I guess . . .