Hi Tanmznaj1
This is standard EA policy for account security, I'm afraid. We can only update our email addresses and/or EA IDs once every 30 days, unless it's a case of changing the account email address back to an old one that was used before.
If you wanted to double check, the "Update your information" section has the disclaimer about the waiting period.
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This guide covers the unlinking process for platform accounts and the associated risks. I'd recommend paying close attention to the warning in the "What are the risks?" section, though, so you're fully informed.
