Prepaid Code Not Redeemable

Hello, it's been a while since I have played xbox, and last year I had got the xbox one s. My mom usually buys the 1 year live cards (physical) version that you redeem yourself by putting in the code. It has worked numerous times when I've done it with my
360. That is not the case though. My mom had finally gotten me 1 year xbox live at the beginning of this month and for some reason it said
"this code is not yet active. Contact the merchant to activate this code." I had wondered why and she told me she just bought it through the self checkout and I told her she couldn't do that. She must go and get it scanned to active it. She does the
next day, she shows the guys the error picture so they wouldn't think it's sketch, and when she gets home, she hands me the card. I haven't touched or looked at the card until tonight and realized it a whole new card. I scratch off to reveal the code and input
it in to redeem it and YET AGAIN, the same "code not active" message pops up. She payed for that card and it became a complete waste. We always buy our cards at Walmart and it's a pretty good Walmart. I just want to know how I can resolve this issue because
what the point of buying a whole new console (that's hella slow tbh) and not have xbox live? Should have just switched to PS4 this year so I wouldn't worry about live.

:)

 

Need help redeeming my xbox live code

I tried redeeming the code in my browser on my computer using these instructions, big mistake. It said "thank you, you redeemed your code" and then exited me out. No gamertag registration whatsoever. I thought the whole point of redeeming my code was to create a gamer tag, but no just exits me out. I then tried redeeming my code on my xbox (so that I could create the gamer tag) and it said "sorry, code already redeemed."

so what the... what do I do now?

 

Prepaid Code not redeemable

I purchased 3 10€ prepaid cards in order to get a dlc .

2 of them worked flawlessly but the third one produced an error

Saying: Try again later. So I tried later but then it would just say,that the code has already been redeemed. The thing is: I didn't receive the money so now I've got a redeemed code which didn't get me anything.

What to do?