Bad customer service from petrol attendant

Me and my husband went to the Engine Garage in Penford Uitenhage. It was really full on that day but we were very patient. As we were waiting for the car in front of us to finish filling up which it did and when it was our turn to get helped the petrol attendant ignored us and helped another white guy who came after us. When I approached him to tell him we were there before him he ignored us again. I went inside the shop and called the Manager it was a colored lady I still remember her face I told her what happend and she confronted the petrol attendant I was shocked of the way he responded to her manager he said to her he will not apologize because he did not see us and he walked away.

It was quite obvious that she was scared of him and there was nothing she can do about this.

This was unprofessional and starting from that I told myself I will never ever fill up at any Engine Garage again.

Please advise what to do about this problem as I feel I was treated unfairly and this petrol attendant will do it someone else .

Kind Regards,