Pro Gaming XR1000 - Can't connect to NBN home - says no internet connection

[KAustralia]

Hi. We are not getting internet to the router when we connect to the NBN home box. Our ISP said it should be compatible, We have tried Netgear support who after 2 hours trying to help told us the unit was faulty. We returned it for a replacement and have the same issue. It says no internet connection on the app. No issues with our internet to the house. Any suggestions please?

[FURRYe38]

What is the Mfr and model# of the Internet Service Providers modem/ONT the NG router is connected too?
Be sure your using a good quality LAN cable between the modem and router. CAT6 is recommended. 

Be sure there are no specific ISP configurations needed. Something to ask the ISP about. 

Has a power off for 1 minute then back ON with the ISP modem and router been performed since last update?
Be sure to restart your network in this sequence:
Turn off and unplug modem.
Turn off router and computers.
Plug in and turn on modem. Wait 2 minutes for it to connect.
Turn on the router and wait 2 minutes for it to connect.
Turn on computers and rest of network.

[Netduma-Fraser]

Do you know if you require PPPoE or VLAN or DHCP identifiers at all for a connection?