I got a 25 euro Xbox card when I wanted to redeem it because the code was invalid. Is this happening for the second time?
Maybe contact XBOX.
Where did you get the code from?
In your place I would just contact the support: https://beta.support.xbox.com/contact-us?isChatCallAvailable=false
Media market Wiso?
Has already happened to me. The cashier didn't activate it. You have to go there and say that she's not going. Or you write to XBox Support
Feel free to send me the code, I'll try it and tell you if it worked.
Yes, the cashier said "there was nothing she could do" but I'll write to Xbox Support
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If she has not activated it then she must do it, she can see it if she has not activated it