Suspension of services after making a payment arrangement and making the required down payment for the arrangement.

On April 16th I utilized the Xfinity app to create a payment arrangement for my past due amount. It informed me that I would need to make a $50 payment that day and that the remaining past due amount would be spread over the next 12 months. I paid the $50. Then I noticed that it looked like my account was still showing past due a couple of days later. So I went on the chat and talked to an agent. The agent was only interested in trying to get us to sign up for a new plan. Which didn't help at all. They finally admitted that there wasn't anything they could do about the payment arrangement and that I needed to call in. I went ahead and called in, spoke with an agent and explained the situation. She said that since it had been less than four business days at that point that the payment arrangement just wasn't showing yet, but that the $50 payment was there and not to worry.

Today my service was suspended. I tried calling in to talk about it. I immediately asked to speak to a supervisor since I've already talked to two agents (1 by chat and 1 by phone) about my issues. She asked what the topic was and I filled her in. She then immediately offered to accept full payment on the account today. I said no that I have a payment arrangement with Xfinity that needs to be honored and that I wanted a supervisor. She then offered to take a payment for the past due amount. I told her no again. She then offered to make a payment arrangement. I told her again that I already had a payment arrangement. Why else would I have paid $50 on the 16th? I again asked for a supervisor. She then proceeded to have me on hold for over 20 minutes before we were "disconnected" telling me she would get a supervisor. 

So is there anyone there that can help me out? Or is cancelling my Xfinity after over 11 years the only option?