Lack of customer service

I arrived at clicks 5 minutes before the store closed on the 3rd March 2016, obviously not on purpose. However, I needed to buy something at the pharmacy on the self-medication counter. I was the last person on the queue while someone else was assisted, but the lady who was helping a customer before me just walked away after helping the customer who was before me. She said it loudly that she's closing the counter and she's leaving without helping me. I found that to be very rude. She could just have told me to use the next counter instead of being so rude. Very disappointing. Clicks should train their staff on customer service....