formal complaint

There probably won't be an answer here, but I would like to file a formal complaint.

I continue to pay for service that has continual outages, and Xfinity claims there is no outage, but even today there is a Xfinity technician on the street, I took a photo of the truck outside my window. The tech says the service is out, Xfinity says it isn't won't give me a credit, again. Won't let me speak to a manager, and I am not getting the service I am paying for

This is super frustrating, I have have been paying for   the 1Gig service for 3 months now, and it is down twice a week, and they just don't care!