At moment I tried myself to manage my account email. Because I want to link my primary Xbox Live Account with my official email address. But Accidently, I created one Xbox Live Account with my new email.
So I followed these steps to switch my account's email.
Right now, I created another email to process. I successfully switch between my primary Xbox Live Account with my new made email, also I switched my ''Unwanted'' Xbox Live Account with my old email which linked with my primary Xbox Live Account.
So now, I got my official email address ''free'' and ready to switched with my primary Xbox Live Account. But at the moment when I want to switch, it says my official email address is still linked with my '"unwanted'' Xbox Live Account. But it should already switch between my old email and my official email. When I logged in again. I see that at right top corner of my TV, my official email is still linked with my ''unwanted'' Xbox Live Account. But the problem is when I go into Setting->Account->Switch Live Account, it says it's my old email linked with. I'm really confused at moment.
So now, I got 2 emails linked with same my ''unwanted'' Xbox Live Account and I don't know how to fix it.
I'm looking for a solution that I can get my official email ''free'' and switch with my primary Xbox Live Account.