Worst Customer experience

I am not happy with the service I received at Vryburg Clicks Branch Pharmacy. I went to check if my mom's medication was ready for collection and the lady that assisted me was very rude and screamed at me like I am an idiot who cannot read. This was the first time I have received such a horrific experience at Clicks, the way that lady looked down on me it was like I was not even fit to be there in the first place. I am rather very disappointed at how she failed at the Treating customer fairly principle. By screaming at me, everyone already knew why I was there, no confidentiality, and also she failed to show empathy. I am a Manager in a customer orientated company and this is the first of it's kind that I have come across. I am rather hurt than disappointed. I felt humiliated