A Microsoft 365 olyan funkciói, amelyek segítenek a felhasználóknak kezelni előfizetéseiket, fiókbeállításaikat és számlázási adataikat.
Disclaimer: Since you described your problem in English, I will also answer in English, even though the customer service page you used is written in hu-hu. If you would like an answer in Hungarian, please feel free to let me know.
Dear @Triklon-IT Kft,
I understand the urgency of being locked out of your Azure tenant as the sole administrator. To protect your privacy and security, I have sent you a Private Message to discuss your specific account details and domain information.
In the meantime, please note that this issue often occurs if there is a conflict between a Personal Microsoft Account and a Work/School Account using the same email address. If the portal asks you to choose, ensure you are selecting the account type used when the tenant was first created.
Please check your private message inbox so we can narrow this down.