Mr Price - Customer service

I am not happy with the service I received at Mr price Golden acre in Cape town, the manager was very rude when I complained to him about the long wait the cashier left me for about 15 minutes saying she is coming back, she is fetching the lay-bye the assistant manager by the name of Peter said cant I read on the till that the cashier is busy she will be back asked him where is that written he told me they are very busy I can see that