Welcome to TPG Community!
We were able to locate your account using your community details and understand that you are trying to configure your own modem/router, but seems unsuccessful.
In order to upgrade the firmware of your device, try to use the TPG supplied modem/router to connect to the internet then download the firmware update on your computer. Afterward, apply it to your Netgear device.
You may contact Netgear support for further guidance on updating the firmware.
... View more