Incompetence by KFC circular drive, Gqeberha

KFC circular drive, in Port Elizabeth online ordering is a shamble. I orders a family meal and they did not include the Zinger wings. I'm sure they realized their mistake, but no phonecall, to sorry,because online they are supposed pick up the error. They even checked the order before they gave it to me. But clearly their checking procedure is faulty. This is not the first time I have experienced an online order that was incomplete. But as of yet no apology. Why then do we have online convience if it's an inconvenience.