Missing Quest - PC

Time: April 19th
World name: Zalera
Character name: Dagmar Keenedge
Monster name: Titan Extreme
Class/Level: White Mage - 50
Party or solo: Party

Steps:
1. Killed Titan Extreme
2. No quest
3. Restarted Titan Extreme Quest
4. Asking to kill Titan Extreme again

Did not get credit for Titan Extreme completion - please fix. Third time posting - do not understand what is so difficult, not sure what information is insufficient. You should not need my computer or ISP specs. This is a simple request.