I didn't receive the parcel, but according to the status it arrived. At the post office the parcel with this number did not arrive. It was sent from China to Germany. There is no money or parcel. The seller does not respond. 2 months have passed. What to do next?

I ordered a parcel that was shipped with China Post. Tracking number says it was delivered June 12th. Parcel is not in mailbox, on porch, wasn't delivered to a neighbour. No delivery captured on doorcam. The mailing address was correct.
Tracking info: ZA00418813901

Seller will not respond to me. I need to know where my parcel is

Tracking number is 03017984635- Where is my parcel? When will I get it?
Tracking number is 03057209269- Where is my parcel? When will I get it?
Tracking number is 03068984634- Where is my parcel? When will I get it?
Tracking number is 03069874884- Where is my parcel? When will I get it?
Tracking number is RE146927823EN- Where is my parcel? When will I get it?
Tracking number is 03107176954- Where is my parcel? When will I get it?
Tracking number is 03107616885- Where is my parcel? When will I get it?
Tracking number is 70876199019- Where is my parcel? When will I get it?
Tracking number is 03114225633- Where is my parcel? When will I get it?
Tracking number is 03108885209- Where is my parcel? When will I get it?
Tracking number is 03114234927- Where is my parcel? When will I get it?
Tracking number is 03130836948- Where is my parcel? When will I get it?
Tracking number is 03140055800- Where is my parcel? When will I get it?
Tracking number is 03017984635- Where is my parcel? When will I get it?