Hi all a provider friend of more the a decade recently encountered 2 random clients..she had not seen  either one ..run into each other at the door  one invited..one just there at the same time ...a month later both are harassing her at her location her phone ..any suggestions...to resolve

Can she change locations? That would be the most obvious thing to do. That and block them. No use changing numbers since they'll easily find her number again from ads, so she'd have to screen thoroughly to ensure they didn't learn of her new location. That'd be the most civil way that I know of, anway.