Disrespectful cashier

I visited the Gorimas store at gateway on the 6th April. Firstly I waited a long time before being served then there was only 1 cashier at the time. I was then called by another cashier in front of the store. I asked another lady for face cream whilst the cashier was ringing up my stuff. Then I notice she stands and does nothing so I wait. After a while I asked what's going on as they making us all wait without saying anything. She responds by saying I told you we offline. I said I didn't hear as I was asking the other lady to pass me face cream. I then said thank you and waited. Whilst speaking to my husband who was standing outside the store letting him know that they off line I turn around to find the 2 cashiers laughing of which the one was looking at me and laughing. I then went to the other cashier to ask her if something wrong with me because she was laughing at me. In her response she continued laughing and said no. This really infuriated me because she continued looking at me and laughed. She also spoke to another customer in another language and laughed. This lead to one of the customers saying I'm ****** which is utmost nonsense. It had nothing to do with race but learning to treat everyone with respect and I feel that I was laughed upon and being made a mockery of. Whilst i have respect for everyone I certainly feel that this uncalled for incident has certainly made me change my mind of shopping at this store.