Domino’s Pizza complaint: Bad Customer service

My mother and I called twice to try to put in an order for delivery to our house in Garland, which is in the 75044 zipcode( minutes away from Murphy). While we’re on the phone they guy says his manager is telling him that they dont deliver to our area, which is odd because on June 13 they delivered to us with no issues. Now all of a sudden they don’t? So apparently the manager decides to go ahead and let us put on the order for delivery. When the pizza delivery guy get’s here (white male) my stepfather answers the door and tells him I’m coming down with the cash. When I finally get down there he doesn’t greet me or say hello, when I gave him the cash before I could even finish saying you can keep the change he is already turned around walking back to the car. Very rude and disrespectful, didn’t say have a good day or anything. With everything going on right now I feel like he probably doesn’t like black people and they didn’t want to deliver to us to begin with because they probably thought we were in the ghetto part of Garland and we’re not. And the delivery guy was probably mad because there is a black family living in the biggest house on the street.