Next time you order something.....first...mess with them on purpose.....change your order like 3x and act like some crazy person....or senile person. Then dress up as Taz, and go wait in the bushes. When the guy comes with your order, jump out....wave your arms and scream at him. Then, run away.
They will never deliver to you again and you will have to order from someone else, which at this point you probably want to do anyway......but you will have the satisifaction of knowing you messed with them.