Internet interruptions

Ever since I have signed up with Xfinity, an in particular these past couple weeks, the Internet drops and there is no way to contact Xfinity, even on my cell phone.  when the Internet returns and sometimes it’s only a couple minutes or so later, I reach out to Xfinity online to research what’s going on and it tells me the connection is great. No outages in the area.  I have never had such poor service when I used spark light.