Hi my name is timmy nd i m here ilegall how can i become legall here?

i dont wana leave australia i came here in 2007 nd i done my certificate 3 in beakry bt after sme time i lose every thing my job my study i was too sick i cant go anywhere and i cancaled my visa nw i m ilegal here frm last 2 year i m overstay here from last 2 year i like to stay here plz tell me any way to stay here i will do that i want my visa back any type of visa plz tell me any way if i leave this country i gona die plz tell me any way?