Multiple payments were made for the same product.
There may be cases where your network (Wi-Fi, LTE) connection disconnects temporarily, or issues may arise from information being improperly sent when making purchases, causing multiple purchases.
If multiple purchases were made, please follow this step for customer service.
Tap [Menu] in the top right corner of the game screen → [Option] → [Support] → [Make Inquiries]
1) Transaction order number
2) Payment Date
3) Payment amount / Purchase Item
4) Server Name
5) Character Name