Phone "upgrade" failure

I'm about to pull out my hair.  10 days ago a technician came to install a modem but left without us having any phone service.  "It should work by 8:15 tomorrow."  That next afternoon I was told the problem is at Cox's end and should be resolved the next afternoon.  5 days later I was told a ticket needed to be created and it should be resolved in 24 - 48 hours.  2 days later another technician (not Cox employee) was dispatched for the next day.  That day (day 9) he was attentive, followed up several times to see if it was working but no.  It was "high priority" and being worked.  What is going on?  We still have no phone and no security system.