Worst McDonald's ever

The utter worst & terrible attitude from an employee that does not know his own name. First they change cashiers and tills in front of waiting customers. The the supposed cashier leaves all customers to fix a juice machine that is already being fixed by the nameless employee. Then a customer who ordered after me got served before me and we ordered the same thing. Just so I can find my order was made and left to go cold. No staff in the whole shop could assist me with the name of Mr unknown