Customers is not so smarts

Yesterday i receiving a call from customers. He asked me how come his things cannot post? How come got arrow massage. I is tell him the reasons why is be the arrow massage but he dont believe me, so I connect to their surfer and check the data. It is exactly what I told him! then he got nothing to say but he ask me wht if next time got this kind of massage arr? Wah....he asks until like my systems got manys problems and always give him massage. So I is tells him to check the data. Then he got nothing to say liao. These kind of customers, really gives you headache. The system already tells him what is wrong with his data but he dont reads the massage but come and ask me. He dont understand engrish or what? Want me to teaches him is it? I know my engrish is not very powderful and colourful, but I is paiseh la if he wants me to teaches him engrish. Already is busy with manys things liao....