2x in a row manastone battle NOT giving 70 coins

This is the 2nd manastone pvp battle (despite clicking on the quest and activating prior to the battle starting and participating in it) that I have not received 70 exarahn coins. I sent in a ticket last week about it and the GM said to show the NPC saying that the mission was complete. Well i took a screenshot this time - and even after the battle ends, the NPC still shows the mission [In Progress] status... not complete. I sent in a ticket again with this screenshot.

Any one know why this keeps happening to me? The very first manastone battle i participated in I got the 70 coins.. but not this time, or the last time.