I was finally able to quit by using an ecig. And not one of the flimsy little vape pens that don't put out any vapor. This is the ecig that I have used from the beginning (and this is the tank). Not advertising, just giving an example. There are countless options out there.
I was able to stop smoking cigarettes immediately and started out vaping juice that was 18mg of nicotine. I weened down and am now nicotine free. I still vape when I get a craving, but I'm not putting anything harmful or addictive into my body.
Hope this helps and best of luck,
Stormy