Smoking cessation. Losing my all hopes.

Hi, I went Angioplasty 1 month ago and Doctors have placed stent in left coronary artery. The reason of having stroke at early age was SMOKING. I weigh 94Kg at the time of my surgery and my height is just 5 foot 9 inches which tells i was overweight as well. The other reasons includes my diet which contains lots of junk food and oily food. I used to drink on alternate days and used to smoke 10 cigarettes per day. My question is, now a days I am having high urge of smoking and I am unable to control myself. I have become so violent which is leading me to be more stressful which is Achilles heel of lifestyle. Please tell me right directions to quit smoking. I am failed to keep up with cold turkey and am losing my all hopes. Thanks.