Bad service

My father came in today to Sausage Saloon he was waiting by the chair the manager Nhlanhla Mthambeni shouted at my father and chased him away... He asked her not to be rude and she said she can do what she wants if she wants to be rude she can be rude and no one will do her nothing we can even go ahead and put a complaint against her shes not scared. Is that how a manager conducts herself. She needs to be trained again and learn how to treat customers