Rude pharmacist Dischem Mosselbay

I was waiting for a script to be filled at the Dischem pharmacy and asked the pharmacist on duty (Nicole) if she knew what the problem could be, and she answered me so rudely that the 2 customers behind me commented on it. She then told them that she is busy with a script, I take it online as there was no customer in front of her. I was so upset that when the assistant returned and there was a problem with the script I rather left. I can't understand why it is necessary to be so rude when a customer asksyou something that is supposedly your job.