Poor customer service from the petrol attendant by name Jan

This morning I drove to Sasal bluehills to fill the tank.As I was in the Q the petrol attendant by the name Jan was assisting the customer before me.He filled up the tank,clean the Windows and processed the payment and it didnot make sense to me to see him doing one thing after the other right where i am suppose to be.When I talk to him advising to move the customer from the tank so that i can get helped he refused and continue with what he is doing.i reported him to his supervisor but he still an attitude the supervisor had to assist. The guy is so rude he be giving such attitude to the customers,he needs to be tought how to treat pick hours.