The problem is that it isn't in your control. You're trusting a third-party to track you only when they say they are. You call in, tell them to stop tracking you, and the phone goes BEEP BOOP BEEP "Ok, we're not tracking you." But you don't know any such thing. So what happens when you quit the company you're signed on with, the one that had you call them in the first place? There's nothing you can do, sorry of changing your phone number, to end your affiliation with Macropoint, and there's no telling that would even do it. You allowed them to start tracking you.
Please, try to get some sleep. There are no evil clowns under your bed. Yet.