Caller ID: Name Not Found, did not leave a message

This person first called from a number that came up private number he said he was from a clean air duct co. I said I was not interested and hung up.  Right away I get a call from. 415 197-6589. I answer and it is the same guy asking why I am not interested in the clean duct thing.  I was fuming and hung up

got a call from this number, CID said "name not found"  I have been getting a lot of important calls from #'s  that do not clearly identify themselves so I thought I'd answer this one. Called me by name and gave her name but did not identify the company.  Said they were offering a special on air duct cleaning.  I  just told them I didn't do business with companies that ignored the "do-not-call" list and hung up.  Do you think they will take the hint?

Got three phone calls from this number. After declining the service, the man accused me of neglecting my wife's safety and risking her death by refusing to have our air ducts cleaned. I hung up,  he called back and my wife answered. This time, my wife told him he was an a**hole and to stop harassing us, she then hung up. The man called a THIRD time and left a message on our answering machine that said "if I'm an a**hole, then you're a c*nt and a [***]". My wife and I have never experienced such harassment by a "company" before. DO NOT answer this call.

Caller ID said 415-197-6589.  What I do now to annoy these folks is answer the phone and then hang it up.  I don't say anything.