I received a call about a legal matter against me. I called and was immediately connected to a person by the name of Karen. She talked very fast and did not want me in interrupt her with any questions. I insisted that she slow down and informed her that I was writing everything down. I asked her for the name of the law firm she was working on the behalf of.I asked to speak to her supervisor also. She refused to give me that information or to allow me to speak to her supervisor. She became very aggressive, rude, and hostile towards me. I requested that she not call me, my job, my family or friends. This made her more rude and aggressive in her approach. She started to threaten to do just that.After I hung up with her she called back again and again.