When problems arise in your travels, you may be able to deal with those problems by complaining to the airline or to one of the authorities that oversee air transportation. When you purchase a ticket, you and the airline have entered into a contract that covers many different situations thay you may face during a flight. When you want to complain about the service you recieve during your flight, you should give the airline a chance to resolve it.
Most airlines have customer service representatives who can take care of many problems on the spot.
If you can't resolve the problem on the airplane or at the airport and want to file a complaint, it's best to call or write the airline's consumer office at its corporate headquarters. Take notes at the time the incident occurs and jot down the names of the carrier employees with whom you dealt. If you send either a letter or an e-mail, make sure that you include a phone number or address where you can be reached. Limit it to one page in length. Include copies of any relevant paperwork.