Disapointed

Good day

I bought a tshirt for my son & a dress for myself about 3 weeks ago, i didnt fit the dress coz i was sure it will fit, my sons the tshirt was to big so i had to return it for a smaller size,but i kept the dress,the cashier took the slip & said that she will keep it,i asked her if it is not possible to make a copy of the slip & she said no, i told her i didnt fit my dress on yet,she said it is not her problem. Now i gave a dress that is the big for me without a slip,the labels is still on the dress, but i am disapointed in the cashier for i also used to work in retail & i had to give a copy to the customer.