Cooking Studio, JHB North - Price Query and Appalling Service

I made enquiries to book a class, and received a WhatsApp quote of R500 per person. I quoted this number to my guests, and requested an invoice. Only to receive an invoice with an additional "admin fee", and when questioned the employee about it, I was told to take it or leave it, as I am not a customer yet, and she refused to give me the name of the owner and/or Manager. Hence I left it.