What tactics can you use to deal with angry customers?

Here the only strategy that works is to listen them out. Agree with whatever they say by statements like yes I do understand how you feel etc. When the customer has clamed down tell him what you can do. If he still is arrogant and wants a refund of the service or replacement of the product it is prudent to escalate the call to a Brand Loyality manager whoes job is to see the customer does not vent his anger in the social media and elsewhere.

1. Remain calm. When a customer starts yelling or being otherwise rude, there is nothing to be gained by responding in a similar manner. In fact, that will probably escalate hostilities. Maintain control of yourself, even if the customer’s tirade makes you feeling like yelling yourself.

2. Don’t take it personally. Remember, the customer is not angry with you, they are displeased with the performance of your product or the quality of the service you provide. Your personal feelings are beside the point.

3. Use your best listening skills. The first thing an angry customer wants is to vent. To do so, they need someone to listen—and, for better or worse, you are that person. Listening patiently can defuse a situation, as long as the customer feels acknowledged in his or her complaint. Hear them out. When they are done talking, summarize what you’ve heard and ask any questions to further clarify their complaint. Body language can be critically important here. Keep eye contact. Stand or sit up straight. Keep your arms uncrossed.  Show how closely you’re paying attention to their problem.

4. Actively sympathize. After the customer vents, he wants to know you understand where he’s coming from and how he or she feels. Express sympathy for their unpleasant customer experience. Respect and understanding go a long way toward smoothing things over.

5. Apologize gracefully. Whether the customer’s complaint is legitimate or not is really irrelevant. If you want her to stay a customer, you need to express an apology for the problem they are having (or perceive to be having). A simple, straightforward statement is often all that’s needed: “I’m sorry you’re not happy with our product. Let’s see what we can do to make things right.”