Where can I file a complaint?

My internet was out for 5 days. The first day it was out, I made an appt with a tech after troubleshooting failed. The first tech came and stated that it was too windy so service was not completed. I made another appt the following day, and this appt got cancelled without any notification to me in any way. So I had to schedule another appt, and the tech who came this time the next day stated that service could not be completed because there was no truck available to help and he postponed the appt to the next day again. On the day service was finally provided, the two techs who came to fix the issue looked back on my notes and clarified what I was being told from previous techs who came. The two who came and fixed my internet stated that xfinity "contractors" that initially came lied and was lazy. The first claim that it was "too windy" was not an excuse per the actual xfinity workers as service could've been completed. The second claim that there was no truck available for the service was also a lie because the tech who came with the truck said the truck was available and the contracting employee never reached out to get the truck over to help. So in addition to dealing with almost a week of outage that could've been fixed by xfinity on day 1, it was prolonged for no reason for the week. The xfinity contractors who initially came in displayed a complete lack of accountability for their work ethic. Kudos to the two techs who came at last and got it done and calling out terrible work ethic from their colleagues, but shame on the contractors who lied and was plain lazy. Where can I file a complaint about this issue?