Assault at Kfc

I'm not much of a complainer, but what I experienced at Kfc yesterday was disgusting. My friends and I are a huge fan of wings, so around 3 a.m we went to KFC. Whilst purchasing it came to our knowledge through the cashier that they don't make card payments after 3am. My friend asked very calmly why they don't make notice of such through a piece of paper so that customers are aware of such and don't inconvenience themselves. Her reply was, " our regular customers know that and I'm not going to answer that stupid question, only the manager can and he is too busy to answer such nonsense". The cashier then went on to say many vulgar xhosa names, to my shock I pulled my friend aside and told him to just stop complaining. Next thing we know a customer comes up and slaps my friend, in shock and anger I start asking why did he do that, no response. His friends then start acting up. In all this the security personnel at KFC is behind the counter watching, doing absolutely nothing to control the matter. So in anger I retaliated verbally and I got attacked, the cashier kept screaming in xhosa, "good, hit him again" , referring to my friend. Still kfc security did nothing but watch. I am so disappointed at both staff members of kfc(especially manager, cashier and security). We do however plan to take legal action