I cannot log in to "https://mtgarena-support.wizards.com/hc/en-us".

Steps taken & results

• I recently changed email address of my account via customer support.
• Since then I cannot log in to "https://mtgarena-support.wizards.com/hc/en-us".
• The agent said that I should post this issue here.
• When I try to log in to the site, it redirects me to "https://myaccounts.wizards.com/account?kind=error&message=User%2520is%2520invalid%253A%2520Email%253A%2520%2520isam.fableswalker%2540gmail.com%2520has%2520already%2520been%2520taken".
  • I guess MTGA customer support site produces an error that says "User is invalid: Email: <MY OLDER EMAIL ADDRESS> has already been taken".

"Which platform you're using"

• I'm using Google Chrome to access the site.

Thanks.