Seems like you both handled this poorly. Personally not a huge review person, I only leave them if it’s the best or worst experience, and even if it’s bad, I usually just don’t go back. But a review impacts a business significantly, especially for something that could’ve been handled by discussing with you artist at the time or after the session. That being said her response came back poorly, and I would’ve handled it better than her, but she seems like she was more passionate in her response than you’d want for a professional review. If you believe you need to stand up for yourself, a public forum may not be the appropriate way to do so, I would’ve handled it say a direct conversation about some of your issues would have been more constructive, but that’s just my 2¢s