Introduction:
A complaint, whether you are the caller or at the receiving end, calls for tact and restraint.
Making a complaint:
If you have a complaint, you may feel angry, but try not to show this: you can never be quite sure who is to blame.
Begin by regretting the need to complain.
Make sure you have all the necessary information at hand (dates of order and delivery, order numbers, etc...)
State the reason for your dissatisfaction and ask for an explanation. If you have any suggestion how the matter should be put right, don't hesitate to say so.
When your complaint has been dealt with promptly, it is Always a good idea to make another call to show your appreciation.