Complain, I don't Care

This guy (adult male, center) wants to complain to my boss about the customer service he received from me. He couldn't figure out how to use our online ordering system, so he sent an e-mail with a jpeg scan of his hand written order blank attached, only it wasn't attached. So I couldn't process an order without an order, right? He e-mailed back 9 days later to check the status of his order, and I told him we didn't have an order from him. He re-sent his e-mail with the order attached, and a snippy note about wanting to complain to my boss for receiving "poor customer service". I replied by saying I'm sorry, but your order wasn't attached to the first e-mail, and that he can contact my boss by calling #, and contact the co-owner by calling #. I went to process his order and guess what? His credit card was declined, so I got to call him and tell him. I shipped his order later that day, but I really don't give a crap if he ever got it. Don't you hate it when you ruin someone's day? Me neither.