Hi @Sirius ,
Welcome to TPG Community!
The modem was shipped and should arrive on or before Thursday this week.
The tracking number of the parcel was sent via Email. You may track it on Startrack.
If your current modem is a ADSL2+/VDSL modem which is compatible with NBN, you may use it while waiting for the TP-Link modem that we've shipped to you.
May we know what is the make and model of your modem? We'll check if it's compatible with the NBN technology.
It appears that this modem is not compatible with your NBN HFC service and we will need to wait for the TPG supplied modem to arrive.
As per checking, it is currently on board with driver for delivery. You may try to reconnect your DSL modem to the telephone socket to see if it will work.
Once you receive the TPG modem, you can refer to this link for the set up guide: NBN HFC Setup - General Setup
Let us know should you need further assistance. Thank you.