I had a similar problem when my Fibre was activated, the router was connected to the internet, all the lights were green and all the devices were connected to the router but nothign happened.
I called the helpline number and very quickly they established that the serial number of the router they sent me, was different from the serial number listed on my account so there was a break in the chain.
It took a few minutes for them to register the right router to the account and then it worked fine.
This might not be exacty what your problem is but is shows that the issue may be an admin one not a technical one, and the helpline was very helpful so I'd give them a call.
Hope it all works out.
Samsung A52S 5G - SM-A528B/DS
Android Version - 12 One UI version 4.1
Last Update 19.4.22
Build- SP1A.210812.016/A528BXXS1CVD1
Baseband- A528BXXUiCVC4
Nova Launcher. Chrome browser.
My phone history (back to 1997!):
Huawei P30, P20, VF Smart V8, Note 4, S4, S2, Tocco Ultra, F490, P300, E250, RAZR v3, Timeport 250, A300, Star-Tac
.png "Community Manager (Retired)"){kind=icon}
