I also got a call from this same woman... different event though. I agree, I am too busy to deal with this kind of annoyance. She is VERY aggressive.

This woman is rude and argumentative.  She refuses to leave a list of names she wants to call so I can take a message for them, has called 8 times, and hung up when I asked for her company name.   She said she is calling for the H.R. Planning Society and wants to invite staff to some kind of meeting.  Then she called and asked for all those other people from other departments.  Why would they need to be contacted?  They are not in H.R.  We are too busy to deal with this kind of harassment.  She needs to take us off her call list.