Why did you charge me a $100 service fee for your faulty equipment???? Comcast is always trying to get more money! [Edited]

I was having internet issues.  I called, and comcast did an online diagnosis.  Comcast confirmed there was a service issue & scheduled a technician for Saturday morning.  The tech told me that the previous tech had done some bad install wiring AND he replaced the COMCAST MODEM.  I got my latest bill and you [Edited: "Inflammatory"] charged me $100 for a service call!   [Edited: "Language"].  Why would you charge me for your faulty install & equipment.  I called, and got transferred 4 [Edited: "Language"] times.  After 30+ minutes on the phone, the last rep I talked to said she could not reverse the charges and needed to escalate.  I got a text a few days late stating [Edited: "Personal Information"] for my credit escalation is "taking longer than expected".     I can't make this [Edited: "Language"] up.  [Edited: "Language/Inflammatory"]I called back a 2nd time, and spent another 40 minutes on hold, being transferred.   This is after comcast recently raised the monthly rental fee for the boxes from $10 to $12 per month.  Comcast removed the $5 automated bill pay credit.  AND RAISED MY RATES EVEN THOUGH I WAS IN A 1-YEAR CONTRACT!    COMCAST LITERALLY STARTED CHARGING ME AN EXTRA $20 PER MONTH OUT OF PURE GREED.  For anyone reading this, and thinking your not alone.  YOUR NOT!  [Edited: "Inflammatory"] Comcast has horrible customer service.  Comcast will charge you $100 for their problem, then make you spend valuable time trying to get it reversed! [Edited: "All Caps"]