Website Created Concrete5.4.2 now broken no way to edit

Permalink has worked since 2011; it is an information only website. Now it is covered with gobbledygook
There is no way to edit it. BlueHost (server) doesn't deal with page set up.
I've tried to install Concrete 5.7.... but it won't install onto the site.

I use Mac. Safari. Help I'm technically deficient and 70 yrs old

View Replies:
WebcentricLtd replied on at Permalink Reply
this is happening because your host have upgraded the version of PHP that your site is using and it doesn't play well with Concrete 5.4.2.

There is a turtorial which shows you how to deal with this:

It does look a bit daunting. Do you have access to the website files - are you able to back the website up etc?
pvernaglia replied on at Permalink Reply
If you call Bluehost tech support they can set your PHP version back so the site will work for you.