Thank you for your support. 
Can i ask how do I create a link that would take the user to a version of the page where the accordion is by default open on a different section?
(in my contact form, i have an error page, and it says “click here to go back and try again” and at the moment obviously as there is no separate contact page it just goes back to index.php.
I’d prefer to be able to provide a link that will take the user back to the site but with the contact section open rather than the home section)

If u open folder you can see about.html, contact.html etc files use them to open default sections, and for contact also u have separate page create use it.
If you want to create new then use visible class for content div.