The renowned management guru, Peter Drucker, once wrote that since “the purpose of business is to create a customer; the business enterprise has two basic functions: marketing and innovation. Marketing and innovation produce results. All the rest are merely costs.”
The first tip about making complaints is perhaps an obvious one, but a difficult one to follow all the same: Don't get angry. But there are some other easy guidelines to follow to help you to both stay calm and still get what you want. A good tip is to sit down and prepare your complaint in advance of any phone call or face-to-face conversation.