Medicom phone No dial tone

Question

My phone has not had a dial tone for almost a month medicom has only been her eone time to look at it.They replaced the modem and it still did not work.So the tech hooked the old one back up.He said it was a problem on their end and they would fix and another tech would be back out to make sure it is working.It's been 4 days no tech yet.I called they said it should be working.I rebooted my modem.I unhooked the cables and the power cord and the battery and rehooked.Rebooted still no dial tone.I need help i am only off today until next monday which is christmas eve.