Unfair

My grandmother and I went to Pick n Pay at savannah to buy my mother a denim and chocolate for her birthday. The cashier was rude from the start. She put my stuff on the counter and very annoyingly slapped the plastic bag ontop for me to put everything in myself. I then noticed they charged me the wrong price because the item was marked off. I made an enquiry and she started speaking very loudly to me. The supervisor came to help after about 3minutes. She then stopped to start help searching for something the manager was looking for. My grandmother asked if the cashier sitting could assist us because we were in quite a hurry. It didnt look like she knew what to do. The cashier then got up to leave. I asked her if she could please pass my items that lying on the other side of the counter and put it in the bag. She rolled her eyes and my grandmother asked her again. She walked away. The manager then came and just shoved everything in the packet. Im home now and all of my stuff isnt even in my bag.