It's a proven fact that a satisfied customer tells 1-3 people~A disatisfied customer tell 7-8 people. You should make it a point to tell as many people as you can about his unsatisfactory behavior. When you pick up your LAST medication from him make sure to tell him that you have spoken to everyone you could and will go out of YOUR WAY to keep business away from his store.
Ask him what he thought about your medical records at your Dr.'s office. See if he can answer that! A Monday morning Dr. is what he is.