Refusal to check my tyre

I stopped at a Caltex Garage on 70 Florida Road and after my Tyre Sensor went on. Upon Stopping at the garage the air was going out of the tyre and I asked \Wellington"a black young guy to assist me and he said that they would have to charge me for just checking my tyre. I thought these were services offered by Caltex as a convenience service. He refused and started saying all sorts of rude things to me. As a woman I could not believe that I had to be subjected to this. Two guys who came to to pour petrol assisted me in changing the tyre. Since when do we have to pay for a tyre pressure cheeck. He still refused to help"