Parts of order always missing

Getting to order through the drive thru. Mention to the cashier can we have a box meal. She says the boxmaster.. I say yes with the burger, piece of chicken and mash.. Not mentioning the chips but Ok she understands. Get to collection point and we get a boxmaster wrap..? Why as i did ask for the burger, piece of chicken and mash.. She calls the manager.. With no problem changes the order. I see its the right box. I get home and theres no chicken piece but everything else. To me this is false advertising! I have placed this order several times and every time something's wrong? Gravy no mash. Chips are old. Salad with no chicken. Famous bowl with no mealies. Or just gravy and no mash.. The list just goes on and on. Im just extremely disappointed every time.