Do you contact the customs office or the carrier first? Currently on a tracking gap myself.

Small wins count. Walking to the mailbox is a data point. Not on a suspicious trust score but the pattern is familiar.

Split orders. Two small parcels beat one large one for reasons that have nothing to do with price.

Written confirmation email after every phone call. Cheapest insurance there is.

Ask for the longer appointment slot. Ten minutes is not enough for a complex history and pretending otherwise wastes both your time.