I got charged 100$ as installation fee for a Cable that was not provided

I transferred my Xfinity to a new apartment. When making the transfer request I was told it would be a simple switch. However that was not the case. I did not have wifi for a whole day. When I had Clearly mentioned I would not be able to afford to looses the internet. I was advised to get a technician as they suspected that the outlet was not activated. I obviously did comply to it. I do want the internet to work if I am paying monthly for it and if it means the technician needs to come and activate then be it.  The technician said it was missing a cable and he did fix it up for me. Worked great. But I got charged 100$ for the cable! A cable that Xfinity did not initially give or missed to let me know to check for when they were assisting me over chat! It takes at least 2 hours to get connected to a live agent over a chat and then they do not explain you what the issue might be or do not give you everything one might require for self activation. and then charge 100$ for it. One would obviously agree to the terms because they want the internet to work. and if the assistant them selves are saying that the port might need the technician activation the customer would obviously say yes to it.  I lost a whole day of working how are you going to compensate me for that? + 100$ that was charged without giving any notice to the customer