Appalling customer service

I went to Identity Kerk street to pay my account on the 30/04/18 and I was almost assisted by Lorraine. Firstly I had to greet her and that told me she knows nothing about customer service. Then I told her I needed to make a payment and her response was" only if you are paying cash". I said no, I'm using a card and she said we are offline. Jokingly I asked"and today it's the last day of the month and I need to make a payment today and this is an inconvenience because you will add the interest and her rude response was" there is nothing I can do about it. I immediately confronted her about the attitude and told her she should at least apologise for it because I don't like the tone and for that I refuse to pay extra interest for their problem. She then said "go to the bank, get cash and come back". Imagine, I then told her for that attitude I will not do that and I asked for her name. The girl just ignored me and called for the next person, I asked her 4 times and she just kept quiet until I asked the guy next to her if that's how they treat customers and if they even have a manager and when I asked again the guy told me her name is Lorraine. I have been a customer at identity for years and I had never even saw her. Wonder where they got her from.