petrol attendant YELLS at customer for his mistake

SASOL COLUMBINE AVENUE JOHANNESBURG SOUTH. Today I asked the petrol attendant to please fill my car with R200, 95 Unleaded. I only had R200 with me as my bankcard was at home. The attendant went past R200. And I said stopped in shock on R290. I then asked him what now because I don't have any other money with me. He just stood there. I asked him to call the manager and he said the manager is not in at the moment. I wanted to make arrangements for paying tomorrow morning. He then yelled at me I must just go.. "just go" " just go" he yelled. And wrote my number plate number down as if I was steeling the petrol. I went inside to see the manager who wasn't there. I told the ladies I will bring the money tomorrow morning and they said it was his fault, cause he is supposed to repeat my order to me. But to scream at me and treat me like I am a ***** because he doesn't listen correctly. He is actually responsible for the repayment of the money. My collegues all support that garage on a daily basis, but they can be sure we won't anymore. Why does the customer get treated like trash? I am sorry he doesn' t have the right to yell at me