How do you handle a customer camplaint?

there are way to handle the irrate and silly customer?

1. understand

2. to listen their concern and issue

3. apologies as possible

4. sympathy

5. and solve the problem

i hope all of you cope and learn this about to handle and this is helpful to answers their question....

and we should understand the customer's issue and problems. think from their side. like jesus said u do to them what u expecting from them...