Silent tracking in the first week is normal. Scanning happens at hubs, not continuously.

Split the order.

The address matters more than the contents eventually. Changing what you order when the address is flagged changes nothing. Same for me with Greece, unfortunately.

Check the register yourself rather than trusting the number printed on the site.

The declaration contradicting the return address is what gets it opened.

How do I find the national register if I do not read the language?

Same here.

Tolerance was my main issue with Greece too.

The declaration contradicting the return address is what gets it opened.

The declaration contradicting the return address is what gets it opened.

Do you contact the customs office or the carrier first?

Photograph everything before you open it. Ten seconds, settles most disputes.