Bad service and rude employee

Early this morning between 1 and 2am the drive thru at KFC was so slow we were about 45min in the line and there was literally 4 cars before us, when my wife went to investigate what the hold is, one of the staff was so rude told my wife she must get back in the car and just wait she is the only one working there but 5 KFC staff just stand there outside, when I we t to investigate I don't know if was the the shift supervisor he told me they are only 3 working the drive come on 5 staff members just standing out and they are a 24 hour drive thru some of the people just got out of line and drove away I ask if we can get the number of someone higher up the rude employee refused and said go back in your car and just wait she was so rude and in front of her supervisor. I ask him if he is going to do something about he said no and also refused we got in our car wait for another few minutes before we got help that time they remove the rude employee and put a cook at the window. The other thing was the window where you place your order was closed and where you had to pick was where have to order and pick up