If you advertise personal readings for me by Barack Obama, and I buy a personal reading from Barack Obama, and I get a reading from someone who is not Barack Ob

If you advertise personal readings for me by Barack Obama, and I buy a personal reading from Barack Obama, and I get a reading from someone who is not Barack Obama, the product delivered was not the product purchased. It doesn't matter that Barack is a certified reader, or that psychic readings are real or fake, or anything else - you didn't give me what I purchased. Sidenote, something doesn't have to be a formally-drafted lawyer contract to be a contract, either. It's just an agreement. Like one where I buy something you offer and I expect that to be the thing that you offered me