McDonald's, no fast food, just rude and unprofessional

McDonald's Florida North... Everything is very modern and you order on a touch screen. We opted for paying cash at the counter, where they didn't have change. Then we waited 15min for our 2 large chocolate milkshakes and 2 chocolate Sundays. The waitress receiving the order called our number, put the order on her side of the counter and preceded to cleaning the counter of slips. We stood in front of her, with our slip for another minute - she just had to proof her point. The milkshake cups had milkshake spills on them and the Sundays were just stuck in the tray, nearly spilling chocolate sauce on me. In the 15 minutes it took them, atleast 6 staff members went to the toilet inside the shop and 6 of them where on lunch, eating McDonald's at the tables located at the door. 2 complaints on orders being wrong and no happy faces in the restaurant as the staff is extremely rude and arrogant. This behaviour is very unprofessional!!