smoke in the living room.

I'm writing this here because, quite frankly, I have no where else to write it. My house reeks of smoke. Cigarette smoke that is, and there is nothing I can do about it, or so it seems. My roommate and I do not smoke, but someone, somewhere, in the building, does. We have no idea where it is coming from, but have deciphered that it is making its way through our vents.
Management has been contacted more than once. No answers have been given. Actually, no reply indicating that it is even being worked on, has been given.
I'd like to think that I am a relatively patient person, but on this issue, my patience is running low low low. I am not sure what the solution really is, but it just seems SO unfair to begin coughing in your own home and having your clothes smell like cigarettes, when you are not the one smoking. It seems that headaches that come from the smell of smoke and not being able to invite friends over who are allergic to smoke, is not really fair if you are paying rent for a place?
Maybe not. Maybe I'm being too picky about all this.
Literally had no where else to vent.