Terrible service at vaccination site

I was verbally attacked by the nurses at the vaccination site. The gentleman who was there first said they had the vaccine and that I just needed to get the form from Clicks only to get back and to have him tell me that it was finished. What really made me angry was he did not want to admit he made a mistake and instead proceeded to insult and even when I was walking away he kept screaming at me using vulgar. I am disappointed and will be reporting him further. That is not any way of speaking to customers. I work in client services and one thing I know, regardless of the situation we don't disrespect customers. Time wasted.