AccuWeb Hosting provides Dedicated server hosting in
Australia. I know it because I am using their Dedicated server and I have never faced any issue with them, they offered almost 99.9% uptime as they promised.
Talking about the support, I am sure they will not disappoint you because they provide 24/7 Live chat, support tickets, and 24/7 hotline.
You will also be able to troubleshoot the fundamental issues by yourself by searching on their self-help knowledge-base.