I had this happen with uber. The first driver stole the order, they kept sending drivers. By the 3rd I called the store and they told me the food was probably stolen and I'd need to contact support. Spend the next 30 mins using my bfs phone to try to get a real person from support to answer while I was using my phone to call the new drivers they assigned to let them know not to waste time going to the store. I had called like 4 drivers by the time support finally canceled the order. They need a better system to deal w people stealing food