I am in the process of joining the air force. My parents are enraged. My mother has even threatened to call my recruiter and tell him lies about me. What can I do to get them to back off?

My parents do not want to be on their own. They are divorced from each other and have never lived alone in their lives. My sister lives with my mother while I live with my father. My father himself was in the air force and loved it. I lived on a military base for six years. But my parents are trying to bribe me out of it, guilt trip me, scream at me, cuss me, degrade me etc. I am beyond fed up. I just wish they would show me a little support.