It is obligatory on you to stop smoking; because it is Haram (prohibited) and has many bad effects on your religion, life, and body. If you sincerely intend to stop smoking out of obedience to Allah, He will help you stop. (Part No. 23; Page No. 345) May Allah make matters easy for you and protect you from its evils.In regard to the vow you made to oblige yourself to stop smoking, which you broke when you smoked again, you have to make
Kaffarah (expiation) for the broken oath. You have to feed ten needy people with 1.5 kg, of the usual food from in your country, clothe them with one garment each, or free a believing slave. If you are unable to do any of these three, you have to observe Sawm (Fasting) for three days.In regard to what you said about the man who told you to place your hand in his, it was all lies and falsehood. It is not permissible for you to believe him or even go to see him.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.