How Do I Contact to Real Live Agent KLM Airlines call +1-888-510-8782, your best bet is their Customer Contact Centre via phone (international: +1-888-510-8782) or potentially through social media (Facebook Messenger, WhatsApp, Twitter) for quick queries, though direct phone calls or the app often get you to a person faster for complex issues like refunds or booking changes. 
Contact Methods for Live Agents: How Do I Contact to Real Live Agent at KLM Airlines
How Do I Contact to Real Agent of KLM Airlines