poor customer service

I got service and was mailed self install products. Ive been installing this stuff reinstalling unplugging replugging calling comcast for two weeks. For two weeks comcast has told me twice that a technical support would come to my home and no call no show, now they say they will come again,,.Wednesday, Jun 17
Your technician will arrive between
8:00AM - 10:00AM

Please be aware that you will receive a call before your scheduled service visit to confirm your appointmentWednesday, Jun 17
Your technician will arrive between
8:00AM - 10:00AM

Please be aware that you will receive a call before your scheduled service visit to confirm your appointment. If they do not come, what do i have to do? Give up ? This is totally not cool and i know im going to end up being charged for comcasts unprofessional acts. I was talking to a rep and being lied to and one even hung up on me. No one wants to give me their info so i cant tell a supervisor about who were rude or anything. For two weeks ive been given the run around and expected to pay for poor services i havent even receive any services other than saying im connected. But i aint seen anything but. Sorry too bad