Phone Question

I have stayed friends with an SP now 7 years retired. Obviously, when she quit she changed her number, and never used her new number for anything related to her past life. Recently someone has been leaving messages using her SP name, and asking to see her. How is this possible? She does have the same carrier, but the number has been changed for so long, and she has no on line presence. She doesn't know if she should just ignore them, or go through the hassle of changing her number again. Should she complain to the carrier?

Maybe a previous client somehow saw her real name while visiting her. If she was working from her real home as opposed to a separate incall, he could have seen something that showed her real name. With her real name, I'm sure there are ways to get her phone number.

She can block the number, and see if the clown takes the hint. If it keeps up, changing numbers is a small price to pay for privacy.

We think we figured it out, and it involves a time in rehab. That means someone who broke trust, but she would rather change number than lodge a complaint. Distressing that people in positions of trust choose to be assholes.