Xfinity Support Chat Rampant [Edited]

It looks like this is happening all the time, so I'll share my story too.

I had my internet under my account, but my landlord/roommate wanted a faster connection. So, we agreed to disconnect my account and upgraded with his account since the agent on the phone said I won't get charged with an early termination fee. 

But then I got a bill for about $100 for early termination.

I disputed it with a support agent and he reduced the bill to $50. He also said that he opened a ticket to help resovle the rest. The due date came so I got charged $52.80. I  went back to the chat and the agent told me that he issued a refund. Several days later, no refund. I went back to the chat severarl times in the course of two weeks, but they kept saying the same thing.

So I make to this forum, and the agents here are telling me something else:

This experience has left a really bad taste in my.