We appreciate everyone's patience as we've worked to find a solution for the Take a Spiritshots Pack quest reward bug. While we're still working on a permanent solution to the issue (which we're currently expecting we'll be able to finalize and implement next week) we are in the meantime making a Spiritshot bundle available on the Shop for 0 NCoin. The bundle contains 3,000 Spiritshots, covering the three quest rewards and more. Once purchased you'll need to claim it from an in-game Dimensional Merchant.
Grab your Spiritshot bundle here: http://store.lineage2.com/store/detail?goodsNo=9600051&categoryPath=1_7
Thanks again for your patience!
For these and other issues, please be sure to keep an eye on the Known Issues thread here: https://forums.lineage2.com/topic/3475-known-issues-classic-launch-1042018/