Message left on Answering machine at former residence

Ok, I haven't shared the same phone line as my parents in 30 years. I haven't received any phone calls on MY phone, haven't received any correspondence to MY residence that I have lived in 19 years. Today, my elderly parents receive a phone message that states my name and that "this is an attempt to collect a debt" on their answering machine. Is that not illegal if they aren't talking to a PERSON? My elderly parents do not need that stress in their lives and I feel that it violates my privacy. I will definitely be calling them to hear what this is all about and possibly an attorney as well. VERY FRUSTRATED!