Merchant contact
http://nichtschulklugsondernstrassenschlau.de
Contact for Matthias Aumann Mission Mittelstand GmbH. Trying the merchant first strengthens your dispute.
No response from Matthias Aumann Mission Mittelstand GmbH?
That's exactly what chargebacks are for. We'll guide you through filing.
File a chargeback for Matthias Aumann Mission Mittelstand GmbH