Welcome to the Community!
My apologies for the service disruption you've experienced. Your service was affected by an NBN outage. It was reported by NBNCo at 7:20PM AEDT last night (December 18) and was tagged resolved today at 9:41AM AEDT.
From what I gathered, the outage impacted 212 customers and it was due to an issue with a power supply unit. NBNCo has arranged an electrician to re-terminate the affected equipment.
I can see that your modem has been up for at least 1 hour already. If you're still having technical difficulties, feel free to leave a comment so we can look into it further.