Bad Manager

I went to summit grill to collect a meal for a customer and the manager Chases me out like a dog.I waited for my meal as she told me to go outside .Once I received my order I approached her to never treat any delivery driver like a dog.And she said that she is the manager with no apologies.Comes to mind if she treats us like that how does she treat her staff as they all looked scared.Customer service is very important not only for the customer but also for fellow colleagues. We are all human and she shouldn't treat anyone with disrespect. I HOPE SUMMIT grills reprimand her.