Customer Service?

I was contacted by a sales rep in March to renew a 2-year agreement. She stated that if we switched mobile service from Xfinity residential to Comcast Business, my company would pay less per month for both internet and mobile service. I agreed and signed the documents. I don't type fast enough, or care enough at this point, to detail the insane number of hours spent trying to rectify what happened after signing the agreement, but in short...the lines were never switched and we have been billed by both Xfinity residential and Comcast Business for the same time period. The monthly bill for the mobile service was higher than quoted and the monthly internet bill I'm now looking at is significantly higher than it was before. 

I wish I had kept a detailed log of how many calls, rerouted calls, email messages, and managers I've talked to trying to resolve the issue. 

Keep in mind, the agreement was signed on April 4; it's now June 10 and there's still no resolution. The last thing I was told is that an escalation team is handling it. Maybe so, but I'm being double billed and overcharged while they work on it. 

My request is that the agreement be canceled, my previous internet rate be honored, and our mobile service remain with Xfinity residential mobile. No one seems to be able to honor this request, or even make direct comment one way or the other. 

Please know that I am an incredibly busy business owner and I just took the time to write out a message that will most likely not get a response. I am disappointed to say the least.