The best way would be to reach out to the person who wrote the review and attempt to resolve any issues or misunderstandings. It’s best to accept your mistake but under some circumstances you should defend your position. If reaching out doesn’t work, you should protect your brand reputation from being damaged and write out a long worded reply going through point by point. This shows to other potential visitors that you’ve already tried to resolve the issue but with no success. It’s all about turning a negative into a positive.How do you deal with a bad review about your site?