Being charged technician fee $100 for an Xfinity infra issue

Really frustrated with xfinity right now. I live in Florida, and rain/wind/thunderstorms are very common here so after few thunderstorms, we started noticing the internet being very slow and we were not seeing anywhere close to the 800 mbps as it should have been, like not even reaching 40mpbs even after trying to troubleshoot. So we called support and they couldn't resolve it either from their end. So the agent said we need a tech to come and get it checked out, note - I did not sign any form or an agreement and I definitely was not made aware of a $100 charge for this appointment. The next day the tech came, he found out that there was an issue with cable outside. He told us he would not be able to replace the cable and another technician would need to come and change the cable. So, we wait and as far as we know, we have not been notified of this cable fix happening nor did a technician come out to let us know that he has replaced the cable. I just checked my bill and there's a $100 professional installation charge under in-home service visit. This makes no sense when the technician hasn't even visited to say that we will be charged a fee when issue is not even determined yet. Why are we getting charged for something outside and related to xfinity infrastructure? I have not approved to any sort of form or agreement prior to this technician visit. Makes no sense why they're punishing a customer for issues caused by their own outside equipment or by natural causes outside of customer control.