Why does Xfinity Train Its Employees To Shut of Internet For Difficult Customers?

Hi all: I have Xfinity cell and mobile. For months now, my mobile has had problems. I have no cell service for long periods of time several times per day. I cannot call, send texts, use the internet, nor use GPS. They sent me a new SIM card, but it hasn't changed anything.

Today, for the THIRD time, when I was on the chat with customer service expressing how frustrated and upset I was about my cell phone not working, and that they've continued to charge me monthly for a service they aren't providing, they have shut off my internet. Internet and cell are two different bills and two different things. Today, for example, the CS agent knew I had no cell reception and only had Wifi, but they shut off my Wifi so I couldn't continue to troubleshoot with them. The first time this happened, I thought perhaps it was a suspicious coincidence, but now that it has happened three times, I know they're doing it intentionally. I find it really shady and dangerous. Without any cell or internet, I cannot contact anyone in an emergency. All three times the internet has been restored within 5 minutes, but I think it's so wrong that their staff is doing this to retaliate against customers who are upset and who would need to take up their time for a resolution. Essentially they kick me off line so I have to start over with someone new. I don't know whether they're training their employees to do this, or their employees are doing it for "fun," but as a customer who feels I've already been treated horribly by this company, I've lost my patience and ability to accept this kind of behavior. I will be changing companies pronto.