Access WordPress off defunct URL

Hi Everyone,

I previously had a wordpress site and would log in through https://www.hayscoolair.co.za/wp-admin/

I tried to remove the /wp on the viewer URL i then ended up editing the URL which was in the Dashboard>> settings>> general>> wordpress address. and changed it from https://www.hayscoolair.co.za/wp to https://www.hayscoolair.co.za . but now with that error i can no longer access my site i get the following error

Not Found
The requested URL /index.php was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

is there a way i can access back my site
thank you

The page I need help with: [log in to see the link]