Does hypnosis really, truly change/remove unwanted behavior? where would the very best hypnotists/hypnotherap?

ists in houston, texas be located? phone book? how do hypnotists really help out people who want to change/remove unwanted behavior, im only asking because ive never been hypnotized in my entire life so thats why im wondering...... apart from hypnotists, what about shaman or voodoo doctors? are shaman and voodoo doctors in a way somewhat similar to hypnotists?