They don't status match.
Dear Mr. Potakas,
Thank you for communicating with us. Indeed, you are a Member of Miles & Bonus with 1.000 Status Miles accumulated. Unfortunately, it is not plausible to waive the Terms & Conditions of our Loyalty Scheme for a premature upgrade of your account.
Allow us to remind you, finally, that you will be upgraded to Gold Membership as soon as you accrue 20.000 Status Miles in total (or 16.000 within one year after your upgrade to the Blue tier).
Kind regards,
Nice and professional reply,