My ‘weather resistant’ garden cupboard was damaged by wind

Argos says cupboard could withstand most weathers but a door blew off within weeksI bought a supposedly weather resistant garden cupboard from Argos in January (for £100) and after less than five weeks the door broke in the wind. It was secured to a fence as recommended in the instructions and the doors held firmly with a reusable cable tie. Half of one of the front doors was blown off, breaking the flimsy plastic corners of the unit and making it unrepairable.I believe it was misdescribed