called at home early morning, left no message

They called no message... I called back using Google and they were not happy with me :)  They first refused to give me the name of the company.  Kept saying they are a private business in IL... then he finally told me they were CCB.  Still no idea who they are... he became very irate when I refused to give him my number and name.  So, no idea what they want :)

Left a recorded message asking for a person unknown to me requesting that person call them immediately about a debt.  Best guess is a Collection Agency.