We have a client she been going to our salon for years, today she come in saying she need to talk. As i remember i did her pedicure 3 weeks ago. Today she come in blaming me for causing with a one big Toe fungus. After that she want me to redo her polish on that toe for free and as i remove it for her. She can clearly see her fungus and then start saying " you know what I'm not going to pay u and I'm not ever going to come back , I'm going to someone else who can do mine instead." She then got up saying " I'm going to report you to the state board". As she was leaving. I don't think the fungus was caused by our salon. And how do i deal with customer like this? Was it our fault? How can i deal with customer like this?