Hi Frances, Yes, this is a problem with hacked email accounts. Maybe Microsoft support has some ideas on this since it is a user user support forum.
Please contact Microsoft Support for further assistance.
Please go to the https://support.microsoft.com/contactus page
Type "Billing" and press Enter.
Please click on the "Contact support" button at the bottom.
Select the Product and Category for support based on your requirements.
The available support methods will be shown to you.
I hope this information helps. If you have any more questions, don't hesitate to reach out.
Otherwise, please take a moment to rate the answer. Wishing you good luck!