Moody and unfriendly cashier

I went to mcdonalds atterbury value mart ,the cashier by the name or surname of MATHAPO C. Gave us a very bad attitude she didn't even greet us ,while we were complaining about her bad service she just walked away .when our order was ready she just left them on the counter and didn't call out our number.i confronted her and told her to improve her customer service ,she was just starring at me n pouting .No remorse was shown .She just ruined my day and appetite.