Hi @Lovettehope,
We have now enabled the ability for you to unlink accounts you do not want linked directly from the My Account website experience.
Go here for the new experience:
https://customer.xfinity.com/#/settings/account#linked-accounts
If you need a guide on how to do so, here's the Help and Support article:
https://www.xfinity.com/support/articles/switching-between-multiple-accounts
Hope this helps, feel free to reply if you need further assistance.
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