When you need help from customer service, even when you’re angry from bad service, you should be calm and rational. Whoever you end up talking to, you want to stick to business and not make it personal between you and them. Most of all, you want to get your concern handled immediately, and the best way to do that is to follow their procedures, because they can’t escalate every little issue out of the blue.
What don’t you want to do? What you don’t want to do is what this silly customer did. Read on and see what trouble you could be avoiding. [Source]