Yesterday I colored a clients hair, her hair was gray and porous and the color job went wrong she ended up with hot roots. I toned her hair and it did look better, but she said it still didn't look right. I was very nice to her the entire time, I explained that I could fix the problem by toning it again and it would be a very quick fix maybe another 20 minutes of her time.  I also said if she found that she still didn't like her hair to just call me and I would gladly fix it for free.  She said she just didn't want to stay any longer and started to leave, I said excuse me but you are forgetting to pay me, she said no I don't think I'm going to pay you because I am unhappy with my hair and maybe when I get home and wash my hair and I like it I might come back and pay I don't know.  She then walked out of my shop. What should I have done, and what do I do If she calls me and wants me to fix her color.  I'm new at booth rental. My husband said I should have called the police. Help. Please