Why do you want them to stop? Because they bother you and distract you, and the more they do that the worse it gets. One way that might help would be to use approaches were you "reply" to them like "okay yeah, but I'm going to listen to my boss, and try anyway" so they don't have power. Also consider they are "brain noise". Realising they don't have power over you could make you more relaxed about them. I once read about a woman who had voices and after years of treatment started to improve once she heard about the Greeks viewing those with voices as blessed and special humans. It can be a lot about context.
Source: mainly this (incredible) book: https://www.amazon.co.uk/Cant-Hear-Them-Simon-McCarthy-Jones/dp/1785922564