I have 3 packages that were supposedly delivered by china post to my address but i never received any packages? i want to know what company in USA was supposedly used to delivered it after China Post transporting? If my packages are not located i want to be refunded or compensated for lost packages

Hello, I bought several ukuleles one after the other from Amazon from September 23rd, 2023 with the following ChinaPost tracking numbers:
AT044996010CN, AT045266581CN, AT053759623CN, AT052277430CN (two more packages for me are still on the way). I would like to receive all of these packages even though the seller has already issued me a credit against my express request due to alleged shipping problems.
The first four packages are already in Germany, were stated as being delivered, but did not arrive. Later it appears as delivered, but at midnight and to the delivery base, but NOT to my address! I would like to receive these packages myself!
Can you please tell me why I haven't received the packages and where they are currently?
Will DPD deliver in Germany? ... as the seller told me.
Could you please arrange for all the packages to be delivered to me! After delivery, the seller can take back his refund.
I hope you can help me!
Thank you very much and kind regards,
Kristof Kuznia

I have 2 packages sitting in shanghai,delivered to air transport stage for over 2 weeks
Tracking number 1: RE078219814CN
Tracking number 2: RE078219828CN

Just wondering what the next step is and how will this move along, i have received other packages, when will i get these packages?