If you would like to make a complaint to KLM, you can follow these steps:

• Go to the KLM website: Visit the KLM website at www.klm.com and click on the “Customer Support” link at the bottom of the page.
• Find the contact page: On the customer support page, select the “Contact us” option.
• Choose the type of issue: Select the type of issue you want to report, such as a complaint, and click on the relevant option.
• Provide details: Provide the necessary details about your complaint, including your contact information, the flight details, and the specifics of the issue.
• Submit the complaint: Once you have provided all the details, submit your complaint to KLM.

Alternatively, you can reach out to KLM customer service team via phone or social media. You can find their phone number and social media handles on the KLM website. When making a complaint, it’s important to be clear and concise, and provide as much information as possible to help KLM investigate and address your concerns.