Syrcus tower loot error

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Thread Title Syrcus Tower loot
Date & Time: 10:30pm GMT
Frequency: happened once
Character Name: Riku Kumi
Race: Lallafel
World: Odin
Class/Level: Black mage lvl50
Area and Coordinates: Syrcus tower 2nd boss
Party or Solo: party of 8, group of 24
Monster Name: cant remember name but its the 2nd boss of Syrcus Tower

i was running Syrcus Tower yesterday and after we killed the 2nd boss, the loot box was opened, bringing up the loot tab on the HUD. now i didn't do anything straight away, i waited a few seconds then went to open the loot. as i opened the loot it came up on the screen that i had obtained the item, and the item was placed in my inventory. now i never even rolled on the item, but i received the ilvl100 monk head piece, lol i don't even have monk at 50. maybe if i had received an item for black mage, warrior or bard i wouldn't of minded, but now i am extremely gutted as im loot locked. is there anyway this item can be exchanged or even have my weekly loot restriction reset? it would be very much appreciated
thanks Riku Kumi