$100 Technician Recovery Fee Applied to Bill With No Forewarning

To whom it may concern,

I looked at the bill I have that is due on 9/15/2025 and saw something concerning. This follows an issue wherein I attempted to self-install my modem, but came to find that when I plugged the gateway into the coaxial cable in my room, it wouldn't work.  When I reached out to Xfinity, they said they'd send a tech out soon thereafter, which is when it was revealed to me that the aforementioned cable was inactive and that another would need to be run into the room for the Internet access to be functional. However, I was at no point made aware of the fact that any charge would be applied, especially because this was an unavoidable installation issue that I didn't cause.
As such, because of the lack of transparency regarding the charge (which actually exceeds my monthly bill) and the inconvenience of not being able to use the internet when I first got the device, I'd appreciate it if this fee could either be waived or that I could speak to someone who knows more about this and can address the issue in a mutually fair and beneficial way. 

Thank you in advance for your consideration and time.