her and ask what she means by "black-listing". If she just means SHE will not see you again, then that is no big loss, right? But is she says she is going to post you name somewhere and slander you for writing an honest review, then ask her where she is going to do that. She probably won't tell you, so you tell her that you will have no recourse if she makes false claims about you but to start a thread about her on TER, and the fact that if she doesn't like your review, she will blacklist you, so customers should be wary of booking with her in the first place.
This happened to me once and this is how I handled it. I ultimately said that she should go her way and I will go mine. I will consider myself blacklisted from HER and I will not try to see her again, but if I hear she is slandering me over an honest review, it will get very ugly and her business will be negatively impacted.
ONE MORE IMPORTANT POINT, if you were careless enough to provide her with your ID, or give her your RL information, ignore this method of taking care of this problem or she can dox you, and that can be worse than being BL'd. If that's the case, and she knows where you live or work, just ignore any further contact from her and deal with whatever problems she creates, if any, as they come up. Another lesson that that once you give someone access to your personal information, they can bully you into submission. Kudo's for writing the honest review.