Just call them back and tell them you don't do any advertising and that you are referral based only. They will ask you the name you do business under and they will remove you from their list.
This call is now coming in, sometimes, several times per day, with no message left.
It is particularly annoying since we are trying to deal with the death of our daughter. It is an intrusion during an already most difficult time.
They call me about once a week. I'm a wedding DJ, and they're trying to get me to advertise. Irritating, but not annoying yet. If it gets that way, I suppose I could start claling THEM once a week.....