I bought the Harley Quinn skin awile ago. To unlock the “Always Fantaboulous” outfit you need to do quests. I did most of them when i first got the skin, but im attemping again since i only have one quest left. My final quest is the “Deal damage to oppents with pickaxe” i already had 60/100 from previous, but as i attmepted to finish my counter has not gone up, and ive in game killed 3 people with just my pickaxe, i was even equipped with the harley quinn cosmetic and her pickaxe as well, and i got second place in battle royal, but nada.