I just made VPN connection to India and UK and I was able to access the site without a 503. As soon as I returned back to a Australian (nbn) connection I receive a 503.
I have removed WordPress from the issue by placing phpinfo page there.
I can view the phpinfo from a VPN (from India), but not from Australia. A plain html page works with or without a VPN.
I know the http GET request is not reaching the site as the phpinfo code is not getting executed from Australia.
A traceroute is indicating the request is reaching Godaddy infrastructure in any case.
How do I get this resolved as Godaddy support are saying it not their problem as they believe it is a server outside of there control. The evidence does not indicate this.