Hi,
I have my system working properly now.
When the modem first connects to the AGL network, it gets configured for use. So you can reset it to defaults and login.
I did call the support line, and there was no wait, and the guy was very knowledgeable and solved my issues.
The other problem I had was interference on the 2.4Ghz network. Since switching to 5Ghz, we have not had an issue (CAT5 cable is even better).
Good Luck