Unhappy customer

I went to Usave Tiyani looking for a C type charger, I waited for more than a minute at the money market while there was no one in there to assist me, I asked the manager if he can help since he was just next to me, the guy told me that he doesn't work there I must wait, I waited, I then told him that if there was no one to help I'll help myself and I was just joking, the manager with attitude said "do it and I'll show you something" I ignored him, I was in a hurry and there were no customers before me, I then decided to go check if they had a charger or not instead of waiting there for more than 5 minutes only to be told that they don't have it, that guy screamed at me telling me that I'm not supposed to be checking, I did not like that coz everyone there looked at me like a fool, we exchanged words swearing at each other, I don't think a we'll trained manager can do what that guy did........ My family and I are not going to buy in that store again....