how to file a complaint

I began the process to switch to Xfinity on Aug 24th. I had an appointment the following Monday however, I did cancel it due to mislead information not from Xfinity. I then redid my request, and a technician came out on September 2d. He stated I needed underground wires ran and put in the request. The request had that I needed to be home when the 3rd party came to do the work. On September 9th the 3rd party came, without notifying me, and supposedly ran the cable. I believe they used the same cable that was there from service a few years back. On September 10th I received a text saying all work has been completed. I called Xfinity to explain I had not been notified, they kept the same cable that was there from another service years ago that ran through the flower bed, and hooked it up to their box. I asked to please have someone call me so we can get them back out to run it properly. I was assured a work order was in and I would be notified. I was not notified, so on Tuesday, September 15th I called to check on the status. I was told my account had been closed. Shocking! Not sure why it was closed.  In speaking with the agent that wasn't very pleasant, she informed me I would be billed $100 to have someone come out. I said, absolutely not. She would not help me, so I hung up. About 30 minutes later I called back and got what I thought was a very helpful lady. Sat on the phone for 35 minutes while she worked everything out and assured me a work order was in. Today. September 18th, I called to find out the status only to be told there is no work order, the account is closed, but he could transfer me to the acquisition team to begin the process again, if that is what I wanted. I said, "no, thank you. It is clear Xfinity does not want my business. I am not going to beg by repeatedly calling for someone to take my business". I am flabbergasted by the lack of customer service. The only reason I wanted Xfinity is it is about $50 less a month than my current provider but after all this hassle, I'll pay the extra $50 to Goggle Fiber. At least their customer service is responsive. However, I am quite frustrated!! And I am sure this complaint will fall on deafs door. Remember when companies would actually speak to customers to try finding out what occurred so they could fix it? Gosh, I miss those days.