I've been trying to get through their 1300 235 664 number and all I got is the bureaucratic run around by the automated voice menu.
I've been going around through "Techincal Support", "Check On Your NBN Order" and many other menu options but they all end with "Could we help you with anything else? To return to the Main Menu press "1" or to end the call just hang up."
They could just have saved my time and just started the call with "Hello! Welcome to Belong! Just hang up now!"
Switch to AussieBB if you can. Better line speeds, better support, no contract. Occasional deals posted here too.