Rude staff

I went in to the Woolworths store in cresta to exchange a pair of torn slippers on the 26/04/18. I was assisted by a lady at customer service by the name of Dudu. I didn't find the size that I required so I decided to wait till the next day. On the 27/04/18 I then went again to search for the size and ended up taking a different pair of slippers all together. As soon as I walked into the customer service section a lady sarcastically remarked "wozani Nizo nceda abo mam" . A guy walked up to me with a name badge written Herbet i believe. I took the slippers out the plastic, placed them on the counter and asked to exchange them for the new pair I had in hand. He then remarked what's wrong with these, holding them with the tips of his fingers as if to say they were dirty or disgusting looking. I told him they were torn and showed him exactly where they were torn. He then left me standing at the till point. He came back with barcodes for the torn slippers and then handed me a paper without explain what I needed to do. I filled the form without argument. I work with customers everyday and I understand the exchange policies. I was not treated the way that I know Woolworths or any other store trains their staff to treat customers. I'm extremely appalled by his behaviour. Being made to feel as if I'm a dirty person that's there to unconvince him when in all actuality it is me who is being inconvienced