I understand that you have not yet received your NX you purchased using your Credit Card. I can relate to how frustrating and disappointing this type of issue can be.
I am sorry you have had to experience this issue.
Please be advised, you will need to contact UltimatePay customer support regarding your issue. UltimatePay is a different company than Nexon and we are not able to assist you with this issue. You can contact UltimatePay's customer support at Find Answers