Greetings, Rune Hunters.

We apologize for the inconvenience caused by 'the issue where purchased Santa Jacket, Santa Hat, and Holiday Star Costumes disappear when restarting the game' that was fixed during the Dec. 19 (Thu) server patch.
※ [Link to Dec. 19 Bug Fixes and Current Known Issues]

If you experienced the issue and your purchased Santa Costumes (3 types) disappeared,
please contact Support and we will make an effort to assist you with item recovery as quickly as we can.

[Go to Support]

We apologize again for the inconvenience this issue caused.
We will always strive to maintain the quality and reliability of our services.

Thank you.