Disrespectful Employee

I went to Pick n Pay Sable Square at 13:00 to buy some Lunch, I queued in Deli section to be served and There were like 5 people before me. When It was 13:25 I went to the manager to address the issue and he sent two ladies to assist, I asked the lady by the name of Nombongo who was helping me why are they so slow and she rep**** " I am not working for you" and I said well, I believe You are here to serve me as the customer and I have a right to complain and she said I am serving you now so why are complaining. I tried to make the lady understand my frustration which is if they take 30min of the Lunch hour and I still have to Queue at the till, then I will not be able to eat because I still have to walk back to my work place in order for me to start eating, she rep**** with a faint smile on her face telling me she does not care what time I eat that is absolutely my problem . I believe who ever works for Pick n Pay represents the entire Brand. I know I am not her boss but I believe I have a right to a proper service and must be treated with respect. I felt like we as the customers are taken for granted by Pick n Pay employees . It is not the first time I encounter Bad customer service from this Branch.