On the subject of addresses. Anybody who wants to send a complaint by snail mail to KLM Customer Relations in the Netherlands, can save themselves the expense of buying stamps by using the following business reply service address:
KLM Consumentenbetrekkingen
Antwoordnummer 747
1100 VG Schiphol
There is even still such an address for the Flying Dutchman Helpdesk
KLM Flying Dutchman Helpdesk
Antwoordnummer 650
1100 VE Amsterdam
Johan