COMCAST: TERRIBLE CUSTOMER SERVICE IN SAN FRANCISCO

I have lived in san francisco for the past 8 years and had nothing but a poor experience with comcast!!! Repeatedly, every time i have someone move in and out of the building below me, Comcast service technicians shut off our service while turning on/off the neighbors below. I try to call them and they assure me that it is a 'service interruption' and should be restored in the next couple of hours, and that if it doesnt and connection errors persue that a technician will be out to restore. Needless to say, technicians never come out and i spend hours on the phone wasted with technicians trying to figure out why they cannot restore connection to my internet and cable connections when i KNOW why it isnt being restored---BECAUSE THEY BROKE THE CONNECTION COMING TO SERVICE THE NEIGHBORS DOWNSTAIRS. Now I have to waste time out of my day (from 12-2PM) to wait for a tech to come and restore service. What i dont understand is why they said the technician could come out in the first place to try to restore when i wasnt home---anyone see whats wrong with this picture???? why am i held captive to comcasts inability to correctly service THEIR mistakes the first time around. Oh and the manager was quick to inform me that they would be able to only credit the few days that i was left without service.....what about the time i spent calling your service techs who didnt know what they were talking about for 3hours?????
I am a very good customer to comcast and i am SICK of getting the run-a-round time and time again for THEIR mistakes which they have to correct on MY TIME....what is that about?
CUSTOMER SERVICE ANYONE????COMCAST??????