A petrol attendant insulting me

I received a bad service from a girl called Joyce,I went there to pour petrol and I greeted her and she was quiet 3 times,and then she raised her voice at me and said Are you pouring petrol or what?and she walked away,I then got off the car because I was ****ed and she insulted me and called me ****,I asked for a manager and they told me that they don’t keep manangers numbers there.i got a sense that they were protecting each other.it happened in Fochville Caltex garage Tuesday around 19:30,please do something about this because if you don’t I will