Have you ever considered the possibility that your neighbors have nothing to do with this at all and the odor is the result of previous tenants? I mean, my neighbors tend to have some pretty fragrant cooking but it never seeps through the walls; it’s only when I go out on the shared porch or open a window in the front of my apartment that the odor get in. The only way I can think of odor going through a wall is if you and your neighbor are separated by a curtain… and a gauzy one at that as many fabrics are pretty opaque to odor, and most building materials (like sheetrock) are even moreso.
If you have any windows or doors, then the only thing that will really have any effect is positive ventilation as @LuckyGuy suggests… with either bottled air or an intake that pulls air from miles away to avoid sucking in “polluted” air because @Shovon22 is correct that the ventilation system could be a source, and since the odor seems to be coming in through your windows and doors.
But honestly, if you are that sensitive to cigarettes smoke, then living within a mile of anywhere that a smoker has been within the last month will cause you issues. But if you can be anywhere near a running automobile (which spews out FAR more of the same toxins) without going into anaphylactic shock and dying on the sidewalk, that tells me that it’s more of a psychosomatic thing than anything physical.
@ibstubro True, in practical terms there is no real difference between a vent duct and a hollow wall. Some places insulate interior walls/floors solely for purposes of sound dampening, so they aren’t truly “hollow” for purposes of ventilation, but as that adds cost while providing no benefit as far as heating/cooling goes, the practice is not universal. One easy way to tell is how easily one can hear their neighbors.
I do question the use of an ozone generator though. While high-level ozone is good for blocking UV rays, low/ground-level ozone is good for causing many of the same issues as smoking. As a person who doesn’t feel like losing up to 20% of my lung function or risk killing asthmatics who visit me, I think I’d pass on that one.