Originally Posted by
fifty_two
You booked it through KLM ? or a 3rd party website like an OTA ?
To buy your bag you need to reach the marketing airline or entity who sold you ticket . If that doesnt work , try to reach the customer support by phone and ask for help
If none works then go to KL sales office at ARN and give a try either now or before check-in
I booked directly with KLM and have spoken to both KLM and Delta over the phone and neither were able to give me an answer.