POOR SERVICE AND DON'T GET CORRECT ORDERS

McDonald's from Eastrand Mall has the worst service. Firstly I waited very long to get my order and then when I did, I get home only to find out that my order is short of 1 burger. I ordered 2 Big Macs, 1 McFeast and 1 Big Tasty. Yet to my surprise my big tasty wasnt included. Like what the ****? I'm the most unhappiest client right now and certainly feel they don't deserve a 5 star. Everytime I go there, we have to wait for a really long time for orders. Poor service ???