Xfinity Voice number of ring fix

I'm having the same issue. Seems to have popped up in the last couple months. There will be days when it happens three or four times within an hour, at all hours of the day and night.  It is most annoying when it happens at 2 or 3 in the morning. Rings once and then stops.  I have a wireless base plugged directly into port 1 on my xfinity gateway and cannot for the life of me figure out what's going on. I contacted support a few weeks ago via chat and they told me they took action and it would not happen again.  What they did to "fix" it they did not say other than telling me to be sure I was blocking SPAM calls.  All was quiet for the last couple weeks.  Well it started again last night, twice around two in the morning, and another couple times at 5 and 6 in the a.m.   I finally got up and stuffed the wireless handset into my closet. 

This is so frustrating.  

To be totally transparent, the utility company cut the comcast cable for the neighborhood two days ago. after it was repaired and I got my Internet, TV and Voice restored, however I could no longer Stream any channels via the Xfinity Stream app.  I have one cable box still (that was fine) but any Smart TV with the APP failed with an error code of TVAPP-00281.  After two hours on the chat, and two technicians later they said they reset my Xfinity account and once I reset my gateway I was able to watch TV thru the Xfinity Stream app.   About 4 hours later the phantom "ring once" started again. 

I'm at wits end - not sure if it was ever fixed to begin with or if it was re-aggravated by something the technician did last night but I'm at a loss for how to fix it for good.  HELP!!