Thank you for contacting us regarding your parcel. My German is not that well but I think that I've understood the problem.
Looking into the system in the Netherlands, unfortunately I haven't been able to find your shipment. I was able to find it on the German website: https:www.dhl.deenprivatkundenpakete-empfangenverfolgen.html?piececodeCY448717414DEciddhlde.
It seems that the shipment is stuck there. I understand that you are the shipper of this parcel, therefore I would like to advise you to contact the German DHL. There you will need to start an investigation for more information.
I hope you will receive more information about your parcel that way.