Giftcard redeemed for nothing.

I got a €10 giftcard and I went to the store to redeem them (i had 2) 1st one went in but my second didn't. When I entered the code i made sure it was the right code. Everything was fine until I pressed confirm. It was loading/stuck for about 20 second.
Then it said code was already redeemed. I thought it went in but no. I still only had €20 in my account. I had €10 already from before and i usead my 1st giftcard too. I checked my microsoft order history and it said i had redeemed the giftcard for €0. I was
mad. I hope i can get my €10 back. Please Microsoft read this! I really need my money back.

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you should go to support.xbox.com

Hey there Calvin,

Sorry to hear that you're dealing with this issue trying to get your code redeemed.

By any chance have you tried removing and redownloading your account back on the Xbox as outlined in

How to add or remove a Microsoft account on Xbox One?

If you haven't try that out, see if it shows up then and let us know how that helped if it did.

Hope it does, thanks for reading!

Is it possible you tried to load the same gift card twice? I've done similar things like that before.

I would recommend reaching out to MS Customer Support, they should be able to assist you no problem!