Please note that Neowiz does not handle game purchase issues.
If the payment issue has occurred on Steam, you will need to contact Steam support to solve that issue.
In order to qualify for a refund from Steam, you have to meet all the requirements below:
1) Requesting the refund within 14 days after the initial purchase of the game
2) Gameplay time has to be less than 2 hours
3) Not having a record of excessive refund