I'd give them negative times infinity stars if I could. Such an incompetent RUDE staff. You are a customer oriented business. It is your JOB to help people figure things out. Not embarrass them for something they didn't know or realize.
Where do you get off treating people this way. IF you can't do your job then let someone who appreciates having work do it. You won't be missed.
Unprofessional beyond words.
NEVER would I recommend this place to anyone.