McDonald's

I stopped at the Mcdonald's in Rapid City SD off I 90. I ordered 4 McChicken's and 2 Iced tea's. The girl who brought them out gave the 4 McChicken's to the customer behind us. Then she brought a different order to our car. We told her it was the wrong order. Then she went back to the car behind us gave them the order she tried to give us and took the order that should have been ours and tried to give it to us. We said we didn't want it because it was left unattended in someone else's car. That and we did not get the two iced tea's we had ordered. She left in a huff mumbling something under her breath. In about 2 minutes different girl came out with the same exact bag and still without the two drinks. I know there was no way there was enough time to have 4 new McChicken made up because it was another 5 minutes before we got the two iced tea's we didn't get the first time. When we got home and opened the bag one of the 4 McChicken was unwrapped. Whoever was in the car behind us had been in the bag and unwrapped the sandwich before the girl went back and got it. With covid going around we just pitched all 4 McChicken's in the trash. What is your policy about leaving an order in someone else's car? Do you just take it back and give it to someone else? I have pictures of the receipt and the way it looked when we opened the bag and included them. I was very disappointed in the way this went down.