Poor customer service

I went to Markhams Southgate branch today 10.12.2015 to do some bit of shopping, I was assisted by Lebo at the tills. I greeted her and she just ignored me, the next thing she said cash or account, I wanted to ask her if she can check whether I have any reward vouchers available, then I though let me just hand her my reward card without saying anything seeing that she is not interested in giving the customer service she is supposed to give. She swipped my card and concluded the transaction without saying anything to me whether I have vouchers available or with the next purchase. I looked at how her colleagues serve the other customers and they greeted every customer and assisted with a smile. Now the question is, Does Lebo really love her job or is she just doing us (customers) a favor by assisting us? Such small things will push customers away from the Southgate Branch, I am not going back there. I was there to spend my money as well as get decent service, I didnt go there to ask her out!!!