Unprofessional Rude Behaviour

Good Day, I want to complain about a sales consultant by the name of Xolani Kenke at the Makro next to new market (Randhardt/ Alberton) This morning I accompanied my mother to purchase a washing machine and was assisted by a young lady by the name of Zinhle. everything was fine until she asked a colleague by the name of Xolani Kenke if there was stock. He rudely answered her bu saying he already told her there is no stock of the one my mother picked . I asked my mom that we get closer to Xolani so that we dont talk across 2 isles . We then approached him and my mom proceeded to ask him his name so as to address him in his name. The 1st time she asked he ignored her and kept talking, she asked him again what his name is as he said it's written on his name tag,my mom told him she cant see it clearly , he still insisted that she reads it on his name tag. I then stepped and said "she has just told you she cant see , what is the issue with actually telling her your name" He left us standing there and walked off to another section on the store. We asked for the department manager/ supervisor to complain about his attitude. The manager called him and asked him to come speak to us about the way he acted, right in front of us he refused basically saying he doesn't want to talk to us more help us. he finally came and wasnt bothered as we were telling him his behaviour was unprofessional and uncalled for all he did was continue to answer back. I dont know the standard Makro has set for their staff and how the conduct themselves in front of clients but I dont think there is a standard . From a simple request for him to tell us his name he just got rude. this is unacceptable and unprofessional. He showed no respect towards my mother and no respect for his Job. This needs to be addressed with his seriously.