Did you give ATL ( authority to leave ). If not depending on the Freight Co. you may be able to claim even if you did not have insurance. If you did the freight co will not want to know you.
Through my work as a supplier, we are always having shipments advised as lost by the freight co. We call it the big Toll in the sky

I have never seen any sailboard equipment in a Cash C shop, more likely to appear on Gumtree. Hope you have luck locating.
Bet you were looking forward to using it on Saturday.