Shoprote disgusting cashier

Today I was at Shoprite Britannia West Street Durban never been so ****ed by a cashier the lady called Nqobile Mgobhozi she was so annoying and disgusting I greeted her she just did not open her mouth but busy nodding that's when I noticed she was full of it I gave her a R100 note she asked me if I don't have a R20 I told her no then she mumbles some words of which I couldn't hear of which I asked her what was she saying she said she is talking to herself and to me that's obvious she was talking **** to me I'm so disappointed because she seem to be too old to be behaving in that manner and I won't let this slide she really annoyed me