Very bad service

I visited Zebros on 20/09/2015 to get a quick bite for me and my 2 sons ( zebro box & 2 snack burgers with chips). I was assist at the till by 14:14 as per till slip time and and received my order at 14:38. I was order no. 78 and after order no. 82 recieved their goods, I asked the cashier (Masabat Moeketsi) how far is my order she asked the guys at the back who does preparation of orders, just to discovered they never even started with my order. How does that happen? However what frustrated me the most, also the reason im complaining is the lack of urgency to finish my order, they walked at a slow pace fetching the buns for snack burgers and calmly finished up the order. Eventually i left store at 14:38pm after customer no.84 received his order. So spending 24 minutes of my day for 2 snack burgers and zebros box at Zebro's is completely messed up, i get faster service and response time at restaurants... Whats the process for taking orders and preparing orders? From what i experienced is a shout by cashier to whoever is listening behind her. No one take note, No one is in charge, there is just no proper process in place. I am so furious and disappointed for poor service levels