McDonald's

I paid for a order and they didn't fill correctly! Called manager she laughed at me when I told her order was messed up. Then I got there and employee tells me I didn't pay for my order and I did the first cashier added items at window but she wants to argue with me telling me I am wrong! I wasn't wrong I paid for my items had a receipt. And my food was cold they gave me after she found out I was correct and never a apology for there mess up! Worst McDonald's I have had to deal with in years!