Walmart review: treatment of cashier

I went through the cashier checkout with my 4 year old grandson and he saw a pillow pet on the wall along where the restroom is and decided that he wanted that instead of the items I just paid for. As we were walking to the customer service desk to make the exchange, I here the cashier screaming are you gonna pay for that and I said I am going to customer service to pay for it and she kept screaming she did not pay for the pillow pet over and over again. I was making the exchange when a young boy came up to me at the customer service desk and asked me after I paid for the item in question and asked me if I was going to pay for it and the lady at customer service responded it was already paid for. I was very upset that this women screamed so loud that I hadn't paid for my item when she could not have done the transaction for me. I have never been treated so badly in a store ever.