You call your mother.
You tell her that there was a screw-up with the gift card and not to use it until everything is straightened out. If you're embarassed, so be it. These things happen in life.
You realize that one transaction has to be cancelled if you don't want to be charged twice without getting a credit back for one.
It's not rocket science.
The title of this thread is misleading.
And no, I don't work for Kobo.
The fault is not with this forum being "judgemental". The fault is that you are looking at the situation subjectively rather than objectively. We are not supporting your POV and you are getting upset over that. Why did you start the thread - weren't you expecting people to "judge" Kobo's behavior? Your error was that you thought random strangers would agree with you.