Bad service

Hi iam not happy with the attidute of noord street boxer staff. I went to buy and i wanted the prepaid water and electricity. The cashier told me that they don't sell prepaid ( water & electricity) using a card, i must go and withdraw money first, then asked her since when because i have been buying from boxer then with bad attitude, she said she will not sell it to me next time, i can also ask her manager. She called another rude lady, who just told me that she does not have time. I must speak then ask her about this, she said, this is an old law, they are not allowed to sell to us. She left me while i was busy talking to her. It does not make any sense, if i go for shopping i expect to be treated with dignity not to be shouted by your rude staff who does not have manners. Even if you ask for cash back it is a problem. There are so many retail shops that we can choose to shop at