Celestial tiger event problem

ChristianWiz - Archosaur

hi i did the event end up 13 whit more that 2000k of contribution but dint get the chest and yes i went to mailbox and it said mission complete whit in the 5 minutes i got the desperate horn thing that couldn't use it on Bounty hunter i really want my chess plz HELP ME or fix this the problem is here i think no ticket is necessary b:surrender