The reason why all the other methods you’ve tried have failed you, is because they don’t understand what mental & physical cravings actually are. These faulty methods don’t eliminate mental cravings, which continue for many, many years. So you’re forced to use willpower for years, so you don’t relapse. Then a strong emotional event occurs & you start smoking again! The truth is… your brain has adapted to continually generate cravings, and it needs to be retrained back to normal… so you don’t get cravings anymore. Then you won’t relapse.