I got a negative review; now what?

Clients gave me a negative review. I should have canceled when the first problem happened before the stay began, but I tried to be helpful. Things seemed fine until a few hours after they were home and I was blindsided by her anger. I didn't argue or fight. I just told her that I was really sorry that she was so unhappy and that I'd tried hard to do a good job and left it. There was no point in a prolonged back and forth. But the review she left was awful and untrue. I replied and did not call her a liar; I described what I did and what happened and again, expressed upset that she was unhappy. They paid $175 to Rover for all of that, and now she wants to ruin my beginning business. Is there anything else I can do? I had a cancellation yesterday, and I think it was because she saw the review.