Thanks for your feedback. It is always our pleasure to be of assistance.
Here is an article providing some phone numbers about Melbourne IT support. Transition information for former Office Live Small Business customers , it provides an international phone number you can have a try. I’m sorry for lacking of experience about this.
However, I have some suggestion based on your situation for your reference. I have checked your domain by using Nslookup command, and noticed that the domain name server still points to OLSB (ns1.officelive.com and ns2.officelive.com). If your domain name is bought through OLSB, please refer to the steps provided in previous article. You will receive an email with full instructions with how to access your domain at Melbourne IT and then change name server to Melbourne IT (ns1.secure.net and ns2.secure.net).
After you move your domain successfully, you can refer to how to move your website to Office 365 (US/English).
Thanks,
Maggie Li