Customer for 30+ years, charged $100 technician fee for fixing faulty comcast equipment outside my house

I've been a Comcast customer since they were originally "AT&T Broadband", then "Comcast", and finally "Xfinity" (over 30 years). I've seen some really low blows over the years with price hikes/increases, but never have I ever been charged an extra $100 service fee for a technician to come out and need to fix faulty equipment outside my house. I called Xfinity because my cable wasn't working in one of our bedrooms. I received a service ticket for a person to come out in about a weeks time to address the issue. When they arrived, I showed the technician where the cable comes in a few houses down at the terminal. The technician needed fix some things at the "R2DT looking terminal" two houses away in order to get my cable working again. Keep in mind, my internet was working fine the entire time and the cable was too on the main television. The technician was very friendly and appreciated that I knew where everything came into the junction box from the street. I "made his life so much easier," he said. When it was all said and done, he was able to fix the issue from outside the house down by the street and where it came into the house. To my surprise, I went to pay my bill this last month and there is $100 service charge on there. Apparently since I own my own router and modem, they are trying to tell me that there is a $100 technician fee for servicing customer owned equipment. "HERE IS THE KICKER".... I never had any problems with my modem or router and my cable was just fine the entire time. All the repairs for this service call were made OUTSIDE THE HOUSE AND DOWN BY THE STREET. You can imagine how [Edited: "Language"] I was this morning to wake up to this extra charge on my already expensive BASIC CABLE AND INTERNET bill. After calling Xfinity, they can't confirm anything written by the service technician on the service ticket. No details, nothing. Now I'm in a battle of MY WORD VS. THE TECHNICIANS NOTES THAT SAY NOTHING ABOUT THE VISIT. On top of that, the customer service agent told me they are not allowed to give me their full name. Instead, just a made up name "Jenny", who we all know is just a name drawn from a hat at the time of the call. In all my years being with this company that has changed names multiple times, I'VE NEVER BEEN SO MAD AND FRUSTRATED AS I AM RIGHT NOW. The longer I stay with this company, the more lies I'm fed. There are barely any technicians or stores in my area anymore and it would seem to me that most of the customer service jobs have been moved outside of this country. It is getting harder and harder to get help from Xfinity. Especially when they now have AI doing most of the customer service work for them. No personnel attention anymore what so ever....