Bad attitude and lack of communication

I went to KFC at the Sasol garage on the N1, which is about 20 km outside Musina. The lady who was attending to me was very impolite and rude towards me. I ordered 2 coffees and paid. My change was R30.20, I wait for her to return and told her that she had given R30.00 instead of R30.20. She didn't respond with regards to this she just handed me my coffee and spoke to the lady in the next till. Then she gave me the R0.20. I left the store and when I got to the car I realized that the lid she had given me was for milkshake and not for coffee, this would not work for us as my husband is driving. So I went back inside as I thought she had made an error. When I got to her I explained that the lids are incorrect. She just said \we are out of stock"and walked away from me. This is unacceptable if she was exhausted from working through the night"