I re-enrolled in internet service but then cancelled

I made the mistake in a moment of temporary insanity of enrolling in xfinity internet. I immediately realized what a dumb mistake that was. So the day I enrolled, literally minutes afterward, I called Xfinity and explained I changed my mind and wanted to cancel. The service rep acted like they did that. The next day someone still tried to deliver internet equipment. I explained to them I canceled the request and didn't want service. I then spoke to someone on the phone again about cancelling. Fast forward to the end of the month I get a bill for $106 from xfinity. I try chatting with someone about it online, they tell me I have to call in, when I call into Xfinity's terrible terrible phone system it won't even let me request an operator to talk to. Finally after at least 20 mins of menu options and screaming at the automated phone system I talk to someone- who claims they cancelled my service and I won't be charged. Today I look at my bank account, and what is pending? You guessed it, a charge from Xfinity. My question- is Xfinity purposely this lousy with customer service in the hopes that people will just give up?