How to Lodge a Complaint??

Between calls and texts messages, I have spent over 5 hours on the phone with EIGHT different Xfinity agents looking for resolution regarding a no-show technician appointment, no contact from customer service who had promised they’d call by a certain time to check in on the status of the technician visit, conflicting information about WHY the appointment was missed, a rescheduled appointment without consulting me or consideration for my schedule, and long hold wait times.

It came to a boiling point when, after being told a larger credit could be applied to my account for the understandable inconvenience I’ve been caused today but I would need to hold for about 10 minutes…45 minutes go by, and I’m connected with a man that asks me to yet again recap my issue in the first place (which I’ve done many times that day, so the grievances had only evolved) and then tells me that a credit can only be applied after the technician identifies and corrects the issue, and only after **I** reach out again (where I’d have to go back through the insultingly condescending robo-prompts as I try to connect with a real person, again). Admittedly, I was extremely frustrated by this point after the long hold time after 10p at night, and had taken an attitude on the call. But the agent HUNG UP on me mid-sentence, and I then had no way to connect with someone again without another hour+ hold only to yet again recap my issues.

How/where can I escalate this? I’ve never been so disappointed and frustrated with the failure of a company to provide a level of customer service. The entire ordeal has been disrespectful and inconsiderate.