I have a collection agency calling my office everyday telling me to garnish any pay from an employee & send it to them. I keep telling them that the person was a contractor & hasn't worked here in years & please stop calling my office. Well, they still keep calling & now they are threatening me,telling me that it's my last chance to comply or they'll serve me with legal papers. This can't be legal. What should I do? How can I get them to stop? can I sue them if they don't stop harassing me & my business??