A cloud-based identity and access management service for securing user authentication and resource access
Note : I am not a Microsoft employee and the responses are based on experiences and best effort.
Thanks for confirming that you can log into your personal account.
You will find emails that will provide you with your tenant id. (The GUID)
You have mentioned thsat this is your personal Account Subscription. That would make you the Owner/Billing Admin.
With that in mind, you can log a ticket via https://azure.microsoft.com/en-us/support/create-ticket
As a user of personal subscriptions, I would recommend that you setup 3 accounts with reltively secure alternate access to your tenant.
If this works for you, please Mark is as an Accepted/Resolved, so that it can aid others as well
If some part has worked, please add additional notes, so that I(Community) can provide additional support based on additional information.