Harassing Calls. I have no business with you.

I am seriously fed up with your daily calls. I don't owe you or anyone anything. I keep repeating to your agents that the person you are looking for is my former work colleague. But everytime they call he doesn't answer and they call me and I keep saying the same thing. I know the person, I give you his number but it's never enough for you you just have to keep calling me. This is now borderline harassment. I don't know owe you anything. I have no business with you. Your calls are seriously disturbing my life. I have to keep answering and telling you the same thing.