Home internet suddenly not working

I've had Smart Talk Wireless home internet for six months and the service has been great, at least until this morning. I got home from work and none of my devices would connect, and I was prompted to call Verizon. They didn't know what to do and handed me over to Smart Talk. Spent HOURS on the phone with them without resolution (terrible customer service) and promises of a call back (which never came). What came this issue be? My account is paid up, so I'm at a loss of what to do next. Has anyone else experienced this issue? How did you resolve it.