Unfortunately its more than 24hrs ago. But orginally this flight was booked via jetstar and than SIN-AMS with KLM. With jetstar i was able to login and purchase luggage.
however this week jetstar asia stopped flying, this flight got cancelled. And i was rebooked via MH.
any experience contacting KLM about some flexibility here? This was an involuntary change.

and indeed: never again codeshare flight without luggage.

other question: what would MH charge in this case: everthing under excess prices or would they have a standard bag fee?