Family Dollar complaint: Complaint about cashier

Well this is due to a cashier being rude he wears a do-rag on his head, I came in tonight bought food and I had cash stuff, anyway I want to use my food stamp card on part of my food and I swipe the card and said unsignificant amount okay I get that I told cashier that I had $14 on there that’s all I wanted to use off of it and the rest I pay the difference he said I couldn’t do that all he had to do was punch in the 14 and they told me the difference he would not let me do it and so that’s not right I come in here all the time he was very rude I don’t know I put in complaints but that was not right something needs to be done about it. Plus he almost didn’t let me use the coupon I had on some washing detergent I put in my phone number had no problem before he said it wasn’t going through I don’t know what his problem was tonight but I come in between five and six . Thank you and God bless you