McDonald's Wack Service

I went to buy meals for my kids yesterday evening at McDonald's Jubilee Mall, I was highly disappointed by the service we received. I placed an order and was made to wait for too long, and then was told only later that I was supposed to bring the slip to the counter so that my order can be prepared. Thereafter the meal had an error as we ordered waffle fries only to receive normal fries and mind you we paid extra for those waffle fries. I only realized this error when we got home. This is unacceptable and very unprofessional.