Charged in full for cancelation within 4mins.

I made a purchase and realized that I had sent the delivery to the wrong address. Within 4mins, I had to find the place to cancel the order on this awful unhelpful app. And cancelled my order. My order was placed at 11.46 and the cancelation was done at 11:50. They charged me for the order because they say that the restaurant (KFC) already started making my food. Since when does KFC start making your food within less than 4mins? How is this even possible. This is so wrong. Extremely upsetting and terrible customer experience. @UBER_Support, I want my money back. Order number #5C8F8