Why wont my old gamertag go away after i changed my new one?

Hi and thanks for reaching Microsoft Xbox gamer's community. My name is Josef.
I'm an Independent Advisor and a Microsoft Xbox user like you.

Hope you're doing great today despite this ♡

May i know when did you changed the gamertag?
I ask this because in some cases a gamertag change can take up to 72 hours or a bit more to be reflected everywhere

Hello Traice, my name is zahir, i am here to help with your question.

Unfortunately you wont be able to revert back to your old gamertag.

If you are trying to change the gamertag back to the old one and it is says its not available then its not available.

The problem is this MS made a new policy change where any new gamertags including changes in gamertags have a limit of 12 characters.

The old gamertag is 14 characters so this is why it is not available for you to change your gamertag back.

Hi Hargun. My name is Kyle and I'm an independent advisor.

I'm sorry you are experiencing issues with your gamertag change. Please note it will take some time for your gamertag to update across Xbox services. Please allow up to 1 week for the change to take effect.

Please reach back if you have further questions.

On my new xbox I've redeemed my old account but I've changed the gamertag, I'm wanting to transfer games ext from my old xbox to the new one but the data is owned by my old gamertag can I still transfer from the old gamertag to my new one ??

On top of this, when I go to try and exchange my gamertag again, it has my old one. When I click the Xbox logo in the top left, it resets the page and has my new gamertag for a second then goes back to my old one. When I try to change to my new gamertag it then wants me to pay for it. What do I do?