Failure to practice collection due process

Since I am unable to reach a “manager” and a “supervisor” is the highest representative to talk to… I am left no choice than to writing here.

I just spoke to one of your “supervisors” who had TERRIBLE phone etiquette (while chewing her gum) and stated that she had no knowledge of how I could report her and she was the highest I could reach and I had a legitimate bill. 
SO… let’s recap. 
I have been with comcast/Xfinity since 2014. I use to have a business account. But I branched off in 2023 and got my own personal account. Lost my seniority and superb customer service apparently.  Now I am with the rude representatives and people who do NOT care about your customer’s satisfaction. 
Anyway. 
I bought my first home in August. I called to advise Xfinity and they sent two service techs out. Xfinity does not service my new homes area. I called in upset because even my phones had bad service. I did not want to change my internet provider. 
I was advised- per Xfinity- that they could not take care of my new home. They agreed to not charge me any fees for cancellation because it was not my fault, and not my choice- to cancel my internet. 
With additional $25 fee - I kept my phones, and had to go to a more expensive internet provider and pay triple for stand alone service now with another company since my phones- were still with Xfinity. 
Xfinity rep told me- “do not worry, no cancellation fees will be your responsibility, I have put in a ticket, your account is settled” 
Months go by. 
Every month I notice the cancellation charges on my account “$150.08” and call in asking why it is still there. Every month I am advised I am correct- I should not be charged. It was not my fault or choice to lose my service due to a move. 
The reps assure me the account will never hit my credit or go to collections. 
Well. That’s 8 representatives telling me the same thing. “Don’t worry” “it’s taken care of””it will be adjusted” 

Last month I was reassured it would be removed. 
So fast forward to today. 
My credit has its first collection reported. Comcast. $150 

My credit drops 35points. 
I called in to speak to a supervisor. She refused to listen to calls. She was rude. Refused me her supervisor. She told me it was a legitimate bill. 
Countless calls recorded. Countless times your reps told me not to worry. 

But now. 
I was treated with NO respect. I was demeaned like I do not pay my bills on time. 
I was refused any solution to rectify the situation. 
Explain to me… why I should not report this company for their collections procedures? 
I am now trying to contact a corporate number- wasting more hours of my life …. Over $150. 
This is borderline fraud.