Discriminating service from pep cell

I am currently at pep cell midrand boulders to collect a parcel and the lady at the tills refused to assist me coz I'm Zimbabwean and my valid passport does not have a barcode for her to scan.I tried to explain to her that she can enter the info manually coz they once did it for me if which she threw the fone at me and asked me to do it myself.I have requested to see the manager who has bluntly refused to come out of her office.In future can pep and its employees state that their services are not meant for Zimbabwean nationals. The lady has refused to tell me her name Sthe and the manager is Miss Langa