Disrespected

I went to Mvoti ultra city shell garage next to groutville in KZN. I was assisted by the lady called Thandi who started disrespecting me when I told her that my change is not enough, she started swearing at me using words like I must go **** myself. And she said next time she won't allow me to by anything from the garage. I felt so disrespected and I don't want anything to do with that garage anymore