No Dial Tone

I have performed both a hard reset and soft reset checked all the wires and cables for my phones and still have no dial tone. I do have Internet and TV would really like to get my phone dial to him back so I can use it. Any help would be greatly appreciated. I suspect it is something that Xfinity will need to send down the line to my modem. Just not sure how to get a hold of the proper person to do that.