This credit investigator calls our place looking for my brother I tell her that I will pass on her contact information to him as I always do yet she continues to use all kinds of intimidation tactics to get more information out of me. She accuses me of being my brother and berates me in a highly unprofessional way; she's high on a power trip. I call her back and ask to speak to her supervisor to which she responds 'I am my supervisor!'. I tell her that she needs to conduct herself in a professional manner if she wants people cooperation when working as a contractor like this. She accuses me of wasting her time and hangs up. How can I go about reporting her? All I have to go on is her 1-866 #, obviously she wouldn't give me the name of the agency that she is under contract for.

Try googling the 866 phone number to see what agency.

Get caller-ID and see what the regular (non-866) number is from which she is calling.