I think, if you feel the need to respond (and I totally understand not wanting him to have the satisfaction of saying, "Well I did try to reach out to her to make things right."), keep it short and to the point. Your last paragraph is the best:
"My review is accurate. The opportunity has come and gone to make the situation right, and I can't get back that time or frustration. However, thanks to you, I guess I am set up for a huge PR next time!"
Now that you've responded once, I think it's time to move on, regardless of what he says next. You've expressed that you stand by your review, and there's really nothing else to discuss. He's welcome to be upset, and you're welcome not to care. You have better things to do with your time!
gumi- those yelp reviews are nothing short of inspirational. I particularly enjoyed the quik trip review.
this weekend I shall start my own yelp account and I shall review my local businesses. I will also start reviewing things on tripadvisor. I rely pretty heavily on these sites to make decisions so I should give back.
Now that you've responded once, I think it's time to move on, regardless of what he says next. You've expressed that you stand by your review, and there's really nothing else to discuss. He's welcome to be upset, and you're welcome not to care. You have better things to do with your time!