I think you can tell I've bought your NEXON KOREA CARDS so many times, so I know how to use your pin codes.
But this time, I bought your CARDS as usual, then tried to use it on NEXON KOREA game account, it showed up the error message that says 'The payment service is unavailable for a while due to an abnormal payment attempt', and couldn't use the pin codes.
After a while, I tried it again, then now it said 'This is the pin number that has already been used'.
How did this happened, did you steal my money?
Please give me the new pin codes fast as possible, I really need it and I won't trust your company anymore if there is no good response.