Comcast xfinity Incompetent Technicians and Supervisors, Crap Company Comcast Xfinity Palm Beach Gardens Florida

I have never in my entire life seen a company run so poorly. I have two accounts, one for business class internet and one for residential tv (since the business class tv doesn't have normal channels and residential internet does not allow web hosting). All I needed was a new cable box put in to a side room.
In the process of installing this new box, the technician clipped the line that goes in to the house and in to the modem. This is the second time this has happened.
This happened mid-day Friday and as soon as I found out what had happened I called comcast residential to complain about the problem. I got the same response this time that I did the last time, which is that it's comcast business' responsibility. I managed to speak to a supervisor after this and supposedly will have my next bill credited with $20 and would also have a tech out at 9am the following morning, Saturday.
10am Saturday morning comes around and no one has called or shown up, so I call and spend an hour on hold before getting someone. I am then told that there is no appointment scheduled but there is a note in the system about scheduling one. I then wait another hour for a supervisor. This supervisor SENDS AND EMAIL to the office in my area telling them to call me and set up an appointment. I'm told I should get a call within an hour. I hear nothing.
Sunday morning comes around and I call comcast again and after a 20 minute hold get someone who tells me there is an appointment for Monday but there is no time set. I repeat my problem to her as I did all of the others I spoke to over the weekend and she tells me to hold so she can try and get someone out today. After holding for 5 or 10 minutes I get disconnected. I wait for a few minutes to see if she calls back and after no return call I call comcast business.
I get someone on the phone within 2 minutes and start telling them the problem, they test my connection and tell me that the modem is showing online. I have no idea what they're talking about. Then they say it's offline. Then they run some more tests and tell me it looks like it's coming back on.
Around this time my brother walks in from out back with some wire crimpers, a piece of coaxial cable with no ends on it, and tells me that he got tired of waiting for the internet a*s holes to fix what they broke and fixed it himself.
In the end comcast failed to do ANYTHING and my brother went and bought pieces to fix the line, along with the tools to fix it.
Comcasts response was, oh good it's fixed. And then they tell me to have a nice day and hang up.