How you resolved?
Facing problem to connect

Same here. Have to live chat.

The live chat is rather lengthy, as CS doesn't know what was the issue, keep on asking can connect to wifi or not.
Already told router cannot connect to internet (first I didn't know the bridge mode being changed to router mode on ONU)
Wifi connected to own router, surely have wifi but no internet. All green light on ONU and router except on router's wan port which normally turn green from orange after connected.
CS said keep on saying line is ok from their side viewing.
Back and fore asking and answering almost similar question, and also told and screenshot own router page showed connecting failed, CS still asking wifi got or not.
Finally CS asked technical personnel to call back to handle.

Technical personnel call back after ten of mins later.
Told him using own router, straight away he knew the issue (bridge mode being reconfiguration into router mode hence router cannot connect).
And within mins, issue resolved.

From experience, so far after few years of using, happened once only a few weeks ago.
Hotspot 5G using mobile is a good backup plan.

With wifi? 2,4GHz?
or possible router issue?