I tried to redeem a 3m gp ultimate card

It's possible the card was not activated at the register from the shop you purchased the 3 month Xbox Game Pass code from. I recommend you return to the store with the receipt as proof of purchase for help. Xbox/Microsoft cannot help you with this.

could you check if the Cards have been redeemed succesfully although there was an error?

in my case i tried to enter 3m Gold on 360, error, but playtime was activated

No u need 2 redeem the $card then buy gp u dnt need a credit card jus ms account

Can you guys help me out?? I bought a 3m card and i went to redeem code on my xbox. then it says i have to BUY it! what did i do wroung?

Translation:

I have Xbox Live Gold payment for 12 months, how can I go to ultimate?

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Answer:

Hi, you can upgrade to Gamepass Ultimate if you have other subscription simply by purchasing one (or more) month of Gamepass Ultimate.

If this is the first time that you try GP Ultimate your active subscription will be added to the purchased months of GP Ultimate (ie. if you have 12 months of gold and you buy 1 months of GP Ultimate you will have
13 months of GP Ultimate)

if this is not the first time that you upgrade to Ultimate your active subscription will be combined with a fixed ratio (ie. if you have 12 months of gold and you buy 1 months of GP Ultimate you will have
5 months of GP Ultimate, since 12 months of gold correspond to 4 of GP Ultimate)

More information about GP Ultimate upgrade here: https://www.xbox.com/es-es/xbox-game-pass?source=lp