Faulty product

I had a bad experience at Pick n Pay Dainfern yesterday around 6pm the product i wanted to buy was faulty it was a pack of stationary supposed to be having 10 pierces inside the pack to my surprise it was short one piece i asked the supervisor Musa Ngubane about the missing but he said there's nothing he can do and started to be sarcastic and ended up saying i must leave the product,we ended up shouting each other because he did want to do his job and told me to report it feather,I asked him to call his headoffice witch he refused to do so,i left the store angry and very disappointed by the disgusting service i received,people like are not professional yet he supposed to lead by example to his colleagues as he is a leader to them,i was failed as a customer the worse part is humiliated in front of other customers because i was exersicing my right.