What is the 24 hour rule for KLM?

KLM Airlines 【+𝟏-𝟖𝟔𝟔→𝟖𝟐𝟗→𝟏𝟎𝟎𝟓】has a 24-hour cancellation policy. If you book a flight at least seven days before departure and cancel within 24 hours +1-800-211-5032 (UK), you qualify for a full refund with no cancellation fees.