Terrible Customer Service

I've been with Xfinity for 4-5 years now. About a week ago, I called in to correct a billing issue. The agent offered me a new discounted plan that just required me to add a mobile line at no extra cost, and my internet price would be $14 cheaper. Then all of a sudden, this morning I wake up to emails saying "We received your cancellation request" and my Wifi service is disconnected. So I have to call and sit on the phone for 1.5 hours just to be told that "they're sorry even though it's not my fault the service was cancelled, they can no longer give me the same plan I was already on". I now have to pay an increased price for internet. So essentially, Xfinity cancelled a plan I had just spent over an hour on the phone signing up for last week, then forced me to take a new, higher priced plan for the same speeds. Absolutely horrible customer service. The agents are always nice on the phone, but whatever corporate department is responsible for this part of the service is absolutely awful.