I am very good at praising organizations and people for things that they do well but I also believe that it is important to tell them when they come up short. There are several important things that you need to do, however, if you truly want to see change in a situation and not just vent your frustration:

1. Put your complaint in writing - I once heard a professional state that when a company receives a written letter of complaint they assume that there are at least five hundred others who are unhappy but didn't bother to write to them. Letters are taken seriously - even moreso than a telephone call or an email.