Apple ID can't change email
Hello Apple Masters,
I log into my Apple ID with mailaddress A (Netherlands). A few years ago I made a second US Apple ID with mailaddress B. I deleted this account last year so I could use mailaddress B as my standard mailaddress for my standard Apple ID, because my current mailaddress would get inactive from 01-01-2020.
Now I can't change my mailaddress from A to B, if you can still follow me.
Probably because it was previous linked to an old Apple ID.
How can I (or Apple) fix this?
Thanks in advance.
iPhone XS