unfair treatment

I was on a drive way when two costumers decided to park on a drive way and chat.as I was behind them I past them so that I can buy.the lady got angry that why I passed them,I have to wait for them while chatting on the drive way.the lady went to the cashier and report me and the cashier bought that but the cashier never saw what happened. I was ignored by the cashier while helping other costumers. After all costumers left that's when the cashier Linah wanted to here what happened