I would not reccomend champix.
Alot of my mates had some mental issues when on champix. Its toxic shit.
Mate, I reccomend vaping. Get a solid rig that can produce lots of clouds. Go to The Steamery, either in parramatta or beaconsfield. Really good at helping people to start stopping. I'm currently vaping a blend called Macchu Picchu. Lime candy flavored.
Give it a crack mate, highly recommended.