Good Evening,
"As we cannot amend or rectify any electronic customs data"
Seems to me that it is the info from source that is wrong here. Some Clearing systems use the Data transmitted from across the water to Create the entry here, if it is incorrect then your goosed it seems.
Given postal stuff cant be tracked normally if it is not registered I am not surprised that cant tie up with the sender.
A colleague told me a ball of wool was stopped from the UK and RTO. I will buy from Europe these days, bit longer but I got some CDs in the door today no hassle.
Ask them can a broker clear it for you?
George.