@batman to make you feel better, last week I lost internet entirely. So no homephone or suresignal or cellphone reception.
Rebooted the router but that made no difference.
I left the house for a few hours thinking it would be sorted by the time I got home but it wasnt.
Cue the 100m slog up the hill to get cell reception to call support.
As I was talking to the nice man on the phone I realised I never checked the ONT.
Back down the hill, in the house, I find the ONT power plug on the floor instead of plugged into the UPS.
Seems the robot vac got a bit busy there earlier!