Bad service and attitude by staff member.

I went to FNB ATM at Dube branch , I then inserted my card at the ATM and realized that the card is cancelled , I then wanted to use the app to send ewallet to my number, then I asked the gentleman that was assisting at the ATM for the WiFi code so that I can be able to use the app since I didn't have my own data. So he first asked what's the code for and I said I want to use the app my card is cancelled. He gave me the code then after he asked me " how was I suppose to know if your card was cancelled " and I said to him are we going to argue about whether I told u about the card or not? And then he continued to say I was suppose to tell him about the card and I then asked his name and he said i must check his name badge and when I checked he doesn't even have the name badge that is when he said his name is Sithembile or Siphelele ....he went on to say " do u think you scare me by asking for my name".... He continued to say in Zulu " Nina nidelela kabi" meaning we are very disrespectful ,I'm assuming that is us the fnb clients we disrespectful. I'm not disputing him asking the reasons why I needed the WiFi code , but the manner and bad attitude that he had as a staff member of fnb was shocking ...I've never ever been so disrespected by a staff member in my entire life .I hope that this matter will be dealt with as I'm fearing for clients that go there to Dube branch ATM to ask for help and if that is the kind of attitude the staff member uses to assist clients then I'm shocked to learn that I'm with the wrong bank maybe . thanks hope this matter will be attended to. My number is ***. Sibusiso Ngcobo