Please Help! Technician Complaint

I have been trying to have my internet restored for almost a month now. Today was the 3rd tech to come out, but I think he is a contractor and not actually employed by Xfinity even though his van was labeled Xfinity/Comcast. He was here to re-run lines in the walls of my apartment building as the prior techs believed one was cut somewhere/somehow. This appointment was set up by the Xfinity tech who was here 11/15. I did not make this appointment myself. This guy was here today for a couple hours and ended up causing damage to the apartment above me, witnessed by the head of maintenance here. The property manager came over to get his information to initiate a claim and they had a terrible confrontation. He was incredibly unprofessional and combative. He initially lied and said he did not cause the damage but later he admitted to it. He tried to prevent the property manager from taking a photo of his van plate/ID number, refused to provide his name and gave an obviously fake one, he called someone and had a lengthy conversation in a language we did not understand, after repeatedly asking him if he worked for comcast or was he a contractor he admitted to being a contractor but refused to say what company, he provided a number to his manager which was likely fake and resulted in a mere 1 minute call before he hung up saying he was call the tech, he was kicking his van and clapping his hands loudly. The tech was not even finished fixing my line, he had said he needed to come back tomorrow but the property mgr is banning him from ever coming on this property again. I have no idea what to do. My xfinity service has been out for almost a month, which I am absolutely not going to pay for and on top of that I had to go pay for another provider's wireless service because I work from home and reliable internet is mandatory. I need to speak to a supervisor immediately about ALL of this please.