Spectrum Cable Charged for services I do not receive

I have had issues with pixilation on the one television that gets a picture (the others have error messages) and my "high speed" internet is laughable, it's slower than aol dial up was in the 90's! The customer service is equally appalling. I have spent more time on hold than watching my pixilating tv in the last several months. Yet I pay for services that I don't receive as they do not work a majority of the time! The supervisors don't return phone calls and there are so many different departments, one never knows what the other is doing! Put notes in the computer please, how hard is that?!?! After being on hold yesterday and speaking to a SUPERVISOR, who told me he didn't want me to be further inconvenienced and to disregard the message regarding a 9-12 appointment, 3 trucks showed up in front of my house as I needed to leave for work! INFURIATING, since I had planned to be home UNTIL the SUPERVISOR told me not to be! 

They outsource customer service to India and they read a script but can't actually help. I hang up and call back until I get an American service rep, they still read the script but I can understand them. The techs have no idea what they are doing. The one guy that got my tv and internet to work for a few months left the company. I have frontier coming out November 2nd because I can't imagine anything being worse than Spectrum! I have called to recieve a credit for my MONTHS of poor service and HOURS of my time being on hold and meeting with techs (8 techs so far) and was credited $20.00 after a 47 minute phone call!