Do you contact the customs office or the carrier first?

Where does the human data stop and the extrapolation begin? That is the whole thread.

You are not imagining it and you are not being difficult. Document it and take the document in.

Bring a list. Embarrassment makes everyone forget things, including you.

Filing early beats arguing later. And ask for the reference number, always.

Photograph everything. Side effects was my main issue with the United States too.

The published rule and the enforcement pattern are different documents. Only one of them affects you.

Same shape here, different drug. The thing that helped was documenting the refusal rather than re-arguing it. They refer rather than write.