Hello there,
Thank you for reaching out.
We understand you linked an incorrect account to your Cross Save. While we wish we could assist you with this, as of [url=https://help.bungie.net/hc/en-us/articles/35597981889300-Notice-Bungie-net-Account-Unlinking-Update-on-March-25-2025]March 25th[/url], it's no longer possible to unlink platform accounts.
For more information, please see our [url=https://help.bungie.net/hc/en-us/articles/360049498031-Destiny-2-Cross-Save-Guide]Cross Save Guide[/url].