Thank you for post!
I understand that you are unable to access the azure account, and you are getting 53003 error, and your personal account is linked to work account.
The error code 53003 has occurred because the organization set Conditional Access policies which the access has been blocked.
You have used your personal Hotmail account, but it directs to work account because your account is linked to that particular organization. if you no longer working and you can remove your email from your previous employer to do this please follow the instructions as per the document. Leave an organization once you leave the organization try to login to azure with your ID and see if the issue is fixed.
Hope this helps. Do let us know if you any further queries by responding in the comments section.
Thanks,
Akhilesh V.
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