Fios is not responsible for your WiFi just your connection to the service.
now that the service is out, you have notified them and they will dispatch a repairman.
what else should you do?
cable has been out on a few occasions in all the years we had it. Somethings are not of your doing or theirs (Verizon) either ask for credit for lost days, or switch to a provider you think will give you better response service.