I can see your NBN-FTTC 100/40 order is progressing.
There is a self-install component to this.
You will need to unplug ALL existing phones and modem from your sockets, and setup the new NBN cpe.
Can you take note of what the 4x blue lights on the NCD are doing, ie 2x solid, 1x flashing etc.
You may check the setup guide that we've created for NBN FTTC here.
I say ASAP, but because of situation (covid-19) and call centre demand, it could mean any time up to 48hrs.
I would expect someone to call you up to this evening, or during tomorrow.
Try and answer calls to your mobile. A lot of people dont answer unknown numbers and miss the HD call.