I personally don’t think Yelp or Google reviews will get you your money back. I also think that if you get a case against her you may be able to not only get your money back but also potentially save others from being scammed. You can also report her as a business to the BBB etc. posting on Yelp and Google and even here won’t really keep her from capitalizing from other psychic service users. She can even change her business name etc if she wanted to. If you pursue legal she will be held to the standard of law.