Terrible customer experience

I have been an Xfinity customer for 5+ years. I recently changed addresses and picked a new plan when I did. I signed for 1gig of unlimited data for $50 per month at my new residence.

I did the equipment change, they delivered my new equipment. I set it up myself because their service team no showed the appointment that they set. Regardless, Xfinity was already set up in the unit so service was up fine. 

A month after being set up, Xfinity cancelled my service, knocking me offline in the middle of a workday. I had to cancel all my meetings. I went through 3 levels of support in which they told me they could see the plan I signed up for, but they did not fulfill it on their end, and ultimately asked me to return to more expensive $70 plan for the same service. 

I understand errors happen, but as a provider making your customer the culpable party for your own mistake is an awful thing to do. Taking my business elsewhere even if it means spending more at this point.