You also get lane change with auto steer + navigate with autopilot. What I really think you’re buying is an alleged guarantee for upgrading as needed if/when FSD becomes reality. FWIW I kept my 7K, maybe I’ll buy 7K of Tesla stock ...
Does your Motor Vehicle Purchase Agreement from Tesla state: “Free Unlimited Supercharging”, under Vehicle Configuration? If it does, you should be able to get them to rectify this for you.