check signal to my house

a few weeks ago I received text messages stating that "enhancements" were being made to the Xfinity network in my neighborhood. The day that I received the text telling that the work was completed I started getting intermittent pixelization on all my TVs.  I tried chat but that was pretty much useless so had them call me I simply asked if they could send a tech to check the service line to my home (last time I had a tech out about 5 years ago they said that line needed to be replaced).  There has been no equipment change inside my home, so no need for a tech to come in my house.  They agreed that they could do that but when I received my confirmation they had set me an appointment with 4 hour window.  There is NO reason why I need to be home when they check service line and/or signal coming to my house.  Is there a way I can get service line/signal checked without having to be at home?