GC Services Behaved unprofessional, called me a criminal. Nationwide

Man, where do I begin?...I received a call from a Mr. Burney at GC Services telling me that my account with Citi Bank has been turned over to him. I hadn't received any notification on this but, I wanted to know what was going on so I continued to talk with Mr. Burney. He asked me what we are going to do about this debt that I owe. When I tried responding he interrupted me telling me, "It's against the law to steal money."

"Whoa, whoa", I told him. "That was against the law." I let him know that I kept in constant contact with Citi Bank about my financial situation. But, he just kept saying, "My Client says you never told them anything."
Now, I have included this account on my Debt Relief account. When I told Mr. Burney this, he told me that I was wasting his time. He had other people that actually pay him his money. I informed him that Citi Bank's money will be taken care of.

Mr. Burney repeatedly asked me if he could note my account as a refusal to pay. Every time I said that he couldn't, because I never said that. He told me he was going to "get the money in an involuntary manner." Don't know what that means exactly but, it sounds a little like "garnishment" to me. Hmm...Can anyone say against the law, again?

Well, this continued until a supervisor named Mr. Remirez picked up the line and asked me if I cared about my credit. I told him that indeed I do. He said, "Well then, call whoever you have to, to get $3,500.00 paid by tomorrow."

When I asked for both of their first names, I was told, "Watch what you say, that sounds like you are threatening us." Now I ask whoever will listen, "How is asking for someone's first name anything like a threat?"
When I informed Mr. Remirez that Mr. Burney doesn't need to talk to me the way he did, I was told that that was their job...being aggressive. Aggressive? or Unprofessional?

Rik
Phoenix, Arizona
U.S.A.