creditors interchange Bully collector with nothing but big words and threatening accusations demanding MY info. buffalo , New York

Received a call from George Ahern suggesting I call him back by the end of the day or legal action would commence.  Having NO idea why I would be on a call list of a collection agency I called back and spoke with one of George's associates Josh.  He demanded I give him my SSN and Address, when I said "no way" he began to tell me if I did not cooperate it would be worse for me, but he still would give me no reason as to why they were harassing me.  I have him my phone number as a reference point but he demanded my personal information.  I was looking up his company as i was speaking with him and told him I was not comfortable giving him ANY personal information unless he could give me some shred of info that would make me believe he had a legitimate issue or that I was even the person he should be contacting.  He was very rude and demanding and offensive.  NOT going to cooperate on any level with the outfit.