Next hot week, take a screenshot of Maple Admin giving you the item, giving proof of recieving and opening the box so that you have proof you did it right to show Nexon. You'll still get 'working as intended.' but at least you have the proof to show others.
best I've found was the website - Support - Report.
But I love telling people to get one used Karma Koin card, tears of the butthurt, three hairs from Patrick Stewart's head and find the incantation to summon the Godly GMCares4Players that escaped downsizing by hiding as one of the Billing people coming up with pay2win items. it's not true but the absurdity makes it funny
most of the names I use are either my story characters (jackDesert being one of them) or based on foreign words (SilNathair my firepoison mage - Nathair means Serpent and Sil because it rolls into the next part really elegantly.)