I have noted that you have two services with us. I am able to see that your modem has sync at Unit 8 18 rose Street , southport QLD 4215, however you are using incorrect TPG Username, currently your modem is trying to authenicate with your other TPG Username ( belong to address FLAMETREE CCT , ARUNDEL QLD 4214) so you need to use correct TPG Usename which is lisachang888 so try to use that one. If any issue regarding configuration please send me your modem model number and brand name.
I have noted that currently your modem using TPG Username ausinotour so you need to change it to lisachang888
you need log in to Netgear modem by going to http://www.routerlogin.net. if doen;t work then try below address into browser one by one
Once page open then use router default login usually
Password: admin or password
then you neeed to enter your correct UN:lisachang888 in to PPOE and your TPG password then save setting.
see below link which can give you some idea for how to set up modem for ADSL.