Dollar General review: Refund-Exchange

I went to the Dollar General on Selma St. in Dothan, Al. and ask if I could exchange Always discreet boutique adult pull ups for the equivalent Comfort brand. A white female employee explained to a black cashier that it was no problem and how to do it even though I did not have a receipt. After going and getting the Comfort brand and the white employee leaving the area the black cashier refused the transaction. It is not the first time I have had problems there. Another problem I seem to have is when I buy a product regular, they will not stock it. I thought it was because I was a "targeted individual". Whatever the reason it cost you money, not the employee. I feel like customers should be treated better since we are paying.