To resolve the issue with your business account and the error code 13501, you can contact Microsoft support for assistance. Since you are the administrator, you can reach out to them through the following methods:
- Phone Support: You can find the most current support phone number for your region by checking the global phone numbers list. Technical support is available 24/7 in English, and you may also find support in local languages depending on your region. Make sure to have your account details ready when you call.
- Online Support: If you prefer to start your service request online, go to the Microsoft 365 admin center, select Help & support, and follow the prompts to contact support.
Additionally, if you are unable to reset your password due to issues with your phone number, you may need to work with your administrator to update the telephone number on file.
If you continue to experience issues, consider reaching out to the Microsoft 365 Data Protection team for further assistance.
References: