He asks: “What is the origin and purpose of these phone calls, and what is the recommended course of action in dealing with them? I suspect they are desperate final attempts to exert a “show of power,” yet an empty threat, due to the mind control program over me falling apart and leaving the interlopers confounded as to why their efforts to rein me in since birth are failing so dramatically all of a sudden. Is my suspicion accurate?”

You are seeing quite clearly the outlines here of the program attempting to continue influencing you to the negative, even as you grow stronger and are slipping from their grip. Bullying and harassment only work if they are able to induce fear and alter behavior in the course of the life trajectory of the victim. When the victim is empowered enough to stand up to the bully and refuses to show weakness, their would-be perpetrator is the one who becomes powerless. It is not good to boast or flaunt this strength, because it could cause a backlash through an intensification of their efforts. If you simply ignore them and go about your business, that is the safest course and will enable you to continue standing strong and benefit from the ongoing healing working towards your dropping from their radar, so to speak.