Xfinity is punishing me for being a 30 year customer

I am truly disgusted with Xfinity. I have had cable service and internet service with them for literally decades. The cost of the cable service has gone up and up, and I can no longer afford it. I called today to cancel my cable tv, with the intention of staying with Xfinity for internet. I am seeing $50 for five years advertised everywhere, yet the best price they could offer me is $117! I was on the phone for an hour and a half with an agent and a so-called supervisor, and they said that I cannot get any of the promotions because they are for new customers only. I have paid thousands and thousands of dollars to xfinity over the years, have never been late on a bill, and yet instead of rewarding me for my loyalty, I am literally being punished.

I will certainly be sharing this with all my friends. This is no way to do business. It's really disgraceful