Breakfast at McDonald's

I went to McDonald's and ordered breakfast for myself. I waited 10 minutes and went back to check if it was ready, the cashier checked for me and said it would be ready soon. I waited another ten minutes, and went back to check again. The casher said they called me before but I did not show up. The table next to me, two white people barely order two breakfast, and the casher even brought meals to their table in 5 minutes.