Contacting Local Belgium custom to see my packages

Situantion: We have cargos caught in Belguim. We need someone to contact local Belgium custom to see what happened. LX260316317NL LX260337042NL LX260354567NL LX260354496NL these package. You need to call the localcustom. We wanna know why these packages still could not be passed. And what we need to do in order to clear the custom. If need to do sth, what kind of sth we need to provide. Sender: Part of the packages are the gift to do a review. Enclosed you could one of the packages. Receiver:Enclosed you could find one of the pacakges. Package details: All are the clothes.