Installation Fee for Existing Customer

My wife and I are extremely irate with the service from Comcast in setting up our residential internet.  We have been business clients of Comcast for about 4 or 5 years now.  The service on the business side has been great, no issues.  We no longer needed the business account, so we decided to move to residential internet.  We spoke to a sales rep on the phone who told us that if we went to the store, picked up the modem, and installed it ourselves that we could cancel the tech appointment and forego the $100 fee.  Again, we have had Comcast service in this house for 3 years.  
We did exactly what we were told and installed the internet without any issues.  Here is where it gets infuriating.  When we called to cancel the tech appointment (as we were instructed to do), THEY CANCELED OUT OUR ENTIRE SERVICE!  We called in and spent an hour and a half on the phone basically having to set everything up again.  The service rep tried to activate our service without having a tech come out.  She said we could call and cancel the tech after she was done.  The next day we get a call to confirm the appointment with the tech.  We asked, "If they come out, can we get the fee waived?".  Guess what happened shortly after?  OUR SERVICE WAS CANCELED AGAIN!!  Now we have been on the phone for another hour and a half trying to get everything back up.  
It is beyond crazy that clients that have been with Comcast for over years would have such trouble moving from one service to another.  Their excuse is that they can't activate the service without a tech going out because our property "has never had service".  We have been with Comcast (business) for 3 years at the service address.  

At this point, we are very close to canceling our service all together.  It is beyond belief that Comcast can't waive a $100 fee when we are signing a 2 year contract, and when we have already done business with them for so long.  Am I missing something here?  Is there anyway to escalate this?  At this point we have spent about 6 hours between new service, at the store, and tech support, having had to restore our service twice!!  How can we be made to feel like actual valued clients rather than being as frustrated as we are right now with this company?