Bob registered and paid in full to take a year of music lessons (piano) for a total price of $1200 on special. Two months after he starts the lessons, Bob hurts his left hand while at work and the doctor tells him no to use it for four months. Bob decides to cancel the lessons completely. The instructor gives Bob a check for $800 dollars after deducting a penalty of $200 dollars. What are all the illegal acts in this scenario? How much should Bob get back and why?