Nonsense attitude at Zebros

I got the worst service ever at Zebros Mthatha Plaza I got there and ordered while ordering then this lady who's not a cashier approached to say to the cashier no don't help him help our friend like literally and she insisted, I told myself I'm not moving from the till then this lady gave me a nonsense attitude imagine I'm still standing in the queue waiting for my order since 14h48 according to their slip time but my time was 14h22 I mean I'm on lunch too just like their friend.