One of the Worst Experience of My Life - with Billing Dept

I just got off the phone, after talking to two customer service representatives, for about 10 minutes, and having to hold the line for 55 minutes, and at the end of all, no solution, they transferred me to someone else, and during the transfer, it magically dropped the call. I am fuming right now and have no energy to waster another one hour of my life. I am fully ready to cancel my service and move to some other carrier who treat their customers with even little bit of dignity. 

Here was my issue:

I have xFinity Unlimited cell phone plan.

In October 2025, I was planning to go to Canada for a week. 

• I called xFinity a week before the trip. Asked if my plan includes data/text in Canada. They said yes. 
• I went to Canada and in about a day after, I got a text message that I am on roaming charges and have been charged for the data usage. 
• I was shocked. I immediately bought the $5 / month canada/mexico plan, as per the text I got from xfinity. 
• After my trip, in the next bill, I got a big surprise, they charged me $170 for one day of 'roaming' charges!
• I called them up, they said that "Unlimited Plan" was only for gen5 plan and I had Gen4 plan. (There is no mention of anything like this on the xFinity website), and all they can offer is $60 out of $170.
• I explained them that I had called before my trip to Canada to avoid this kind of issue, and they had told me back then that the data was included.
• It was clearly not my fault, even the customer service representative agreed with me, but he could only offer $60 at most and that he would transfer to his supervisor. Just then, he transferred my call and the call got dropped!!!! I have a pretty good network where I was, so clearly, it was not due to network issue. They clearly hung up on me.
• They had no courtesy to call me back, even though, they have my phone number. I did not want to raise my blood pressure with calling their default customer service number again. 

So, I am done with xFinity. Their customer service is hopeless and hellish to work with.