PIZZA PROBLEM

Fire them are make a no phones policy

Crear phone box so your know they are on task

Have a person who works for you be on Garbage duty so the store will be clean at all times

Clean garbage yourself

Train your employees how to deal with situations so they will not be arguing with customers.

Talk to arguing customer yourself solve the problem

The Problem with having no manger is you have no one directing the student workers,so they have no guidance leading to poor work performance.

The problem with that is people are having a long time to wait for there orders which would lead them to assume there is bad customer service which will result in losing customers. You fix this problem by getting faster workers and more dedicated people.