Iā€™m stuck on a Business question and need an explanation.

here is my proposal: I want to write a letter to the supervisor of DoorDash. DoorDash is the app I use to order the delivery food. Once I ordered food from DoorDash, I had experienced that worst customer experience. The driver from DoorDash missed a lot items I ordered, and also gave me the wrong items. I tried to contact the driver, but the driver said thatā€™s what I ordered. This kind of things happened a lot when I am ordering food from DoorDash.

Just write a letter (business writing)