picked up after ans machine and caller hung up

Calling my office, which is a doctor's office, asking to speak with the doctor, but does not leave name, reason for call. The lady is very abrupt and says she will call back. After numerous calls, I explained that the doctor does not take calls on this line, only messages. I asked her to either leave a message for the doctor or not call back again. Ignoring my request, she said she was going to call back anyway at the end of the day and hung up. After some search for this number on google, it suggests this a charity/foundation.

Got a call from a Stacey White at my office stating I have check charges against me, I have no idea what this is about. Has anyone else received a call from this Stacey White?

offers free home alarm then disconects called this number and automated system answers prompting to press 1 to be removed from call list. No indication of who it is

thay call onc or twice a day every day