I am not qualified to comment on homoeopathic medicines, but I can suggest some measures that can help you quit smoking
. Like homoeopathy, modern medicine also has some medications that reduce craving for tobacco. In addition, some simple strategies like taking only one or two puffs rather than smoking the entire cigarette, trying to increase the time gap between cigarettes, eating or drinking something else when there is a craving for tobacco and avoiding being with people who are smoking. There is also the option of nicotine replacement therapy
which although contains nicotine but at least saves you from the adverse effects of smoke and its constituents.
Hope this has been of some help. Best wishes.