Whoa man sounds like a real shitty situation for anyone to be in. However, I would like to just put my 2 cents in here.
I got tuned at HPLogic and have known Jack for a while. My tune certainly didn't take 25 minutes and wasn't done in 3 runs as others have said. I was there with a friend for a bit while Jack did his thing. Results were noticeable and felt good (to me at least).
Granted, my car isn't FI and there didn't seem to be much to do tuning wise from any other bolt on 370z that came in. Every dyno he did, I did see the power going up until it plateaued. But this was my experience.
w.o.w. regardless of what happened with jnaut or jack, your situation really just sucks. Doesn't matter who it is, I, personally, would have lost my ****. I hope whatever the issue is or whatever the problems are get fixed. I met you once (thanks for the exhaust btw
) and you seemed like a cool guy. That said, Jack always came across as a straight forward cool guy as well. But really, only 2-3 people know the full situation. I would hope they would reach out to you to try to resolve the conflict.
BUTTTTT do explain more about this p2a00 code, as I also have it. I'm not sure how a tune in general would cause this (I have seen stock cars and other cars from other tuners throw this code).