How to handle bad/untrue review from Airbnb guests

[Hong Zhu]

Hi 

Just had a terrible guest without any reviews before. Don’t want to talk about details. I have been a super host for 2 years. Never had guests like this one before. This guest just wants a free stay. She threatened me that if I don’t give her a full refund she will definitely give me a bad review. I am here asking for any suggestions for how to handle it. Thanks!