What is best way of handling customer complaint?

The best way of handling customer complaints is to listen attentively, in a non defensive body language, reply politely, try to resolve the complaints quickly and satisfactorily. For complaints which cannot be solved immediately,a polite reply can be tendered.

Thank you for the invitation.

Customer compaints is an area where professional dealings help the company and the customer when it is resolved in the proper way.

Give the customer a positive feeling that you are dealing with them and helping them too.  Listen to them and make notes so that you can record their queries.  If the sales person cannot help then take it to a higher authority to take a resolution on the issues.  An appointment is necessary for this.  Take an email address to report back to them on the decision of the complaint.  and a telephone number will be handy as well so to speak to them and make them feel valued and satisfied. 

Sometimes an appeal has to be made to sanction the right decisions when necessary.  It takes a longer time as more people are involved in the case to work it out correctly.  An immediate supervisor can help in general complaints.

the best way is to listen first, never interrupt the customer, then deal with it accordingly.

Dealing ethically and accurately helps the customer to find the best answer possible.

Stay calm. When a customer presents you with a complaint, keep in mind that the issue is not personal; he or she is not attacking you directly but rather the situation at hand. ... Listen well. Let the irate customer blow off steam. ... Acknowledge the problem. ... Get the facts. ... Offer a solution.

Listen,

Apologize

Empathise

Offer Alternatives

Follow-up

Ensure customer is happy and do whatever it takes to bring her/him back