Escalate. Deal with nobody below district or, preferably, state level. You'll reach a limit with the district manager, so be sure to know who the state contact is. A message to JonMc (Jerome II) or to Jerome has been the catalyst in the past. Evidently there is no Jerome III yet, so.... good luck but the point remains.
As an aside, I'm in the process of drafting my "After a year of ownership of a second Model S" letter, and it pulls no punches. Suffice it to say, other than replacing my AP2 car with an AP1 car out of safety concerns as much as anything else, I have zero plans to own another Tesla unless and until there is a suitable full-size pickup (what I've dubbed the F350-Killer) with actual FSD. And if it's not a Tesla, then fine - they've lost the word of mouth and brand loyalty from me already, and that's just a shame.