iTCG Cards - Broken

So.....Today I decided to get some money by selling some iTCG items. I go to redeem them, come out of the cash shop, and voila, 18 iTCG items, vanished. They were all there in the cash shop, and then when I got out, they were all gone.

So I decided to send a letter to Nexon (hopefully they will respond this time).
The letter:

Today, not 30 minutes ago, I decided to use some of your MapleStory iTCG cards, which I have saved from the second set (OMG! Bosses). I had used 18 code cards before I decided to exit the in-game Cash Shop to check to see how many slots I had available so I could decide as to how many more cards I could redeem. After I exited the Cash Shop, I check my inventory, only to see everything I had obtained from the cards was gone. All of it. Though it wasn't anything that was worth a lot of money in-game, it was still a lot of real-life money that I had just wasted because of the fact that everything just, vanished. I went back into the Cash Shop to see if the cards somehow didn't work and to see if I could reuse them, but sadly, they all failed. I talked over the issue with some of my friends, and they all said that they were experiencing similar issues. If you want to be sure that I did indeed use code cards that were mine, I have the codes right here for you:

List of the Codes and what card they were on goes Here

All of these codes were used on a "mule" character of mine called "*********," which I keep on another account (ID: ********) because of the fact that I cannot have anymore characters on the account I currently play on (ID: ********).

Because of that fact that in your Terms of Service, you clearly state that you own everything of the game, NX Cash, the characters that we all play on, etc, I know you don't have to compensate for a problem such as this. All I want is for this issue to be fixed, for, I have many more cards that I have bought that I wish to use.

Response:

Greetings,

Thank you for contacting Nexon America's Customer Support team.

Thank you for providing the requested information, I will now be escalating this ticket as we begin to process the information. We ask that you be patient as we being this process so we may fully investigate your current issue.

Thank you and have a great day!

Sincerely,

GM Raven
Nexon America, Inc.

For security reasons any sensitive account information has been made private.
Please do not give your password or pin number to anyone for any reason.
Nexon representatives will NEVER ask you for your password or pin.

Gah automated response. At least it's escalated though. =P

So...just to warn those of you who don't know, DON'T USE iTCG CARDS! -_-