Anyone deal with Alliance Asset Management?

What a company that has no class. Got two nasty messsages from them and they called my parents telephone number. I called them back and turns out it is a company that is trying to collect on an old debt from three years ago that I have paid to another collection company. They insisted that it was a different account and that I owed the bill. That I need to "pay my bills" and I told them I did and we tryed to call the other company on conference call however they were closed. I told them I was going to report them to the FCC and they said they would get their legal people involved. Too much. I told them to stop calling and to put that on record.