That's not entirely correct, Rangerwill. Under certain circumstances people do recieve 6 boxes for this package. The additional VAT, which some players have to pay when purchasing from certain countries outside the US, is taken into account as well for the number of boxes awarded.

Yoras, please contact our billing department about an issue like that, they'll be happy to look into this and fix things for you, if there's a problem.
You can find the email form here: https://www.spiralknights.com/support/#mail
Please chose Billing Inquiries, that will send your request straight to the colleagues in charge of billing support. If possible also list your account name and the name of your main knight right away.