Unable to log in to Microsoft account (for administrator)

Business client. I wanted to update my payment details. When I tried to sign in to my Microsoft account, I found that Microsoft Authenticator did not display notifications or display the code. While trying to access my account, I changed my password, which in turn logged me out of Outlook. Therefore, I cannot log in to my email or Microsoft account in any way. I only have a phone number available for authorization. I live in Poland, I tried to call a live consultant dozens of times on two hotline numbers. Every time it starts a virtual consultant which is completely useless. Before hanging up, I provide the address of the support website where I should log in, but I cannot do it because even though I know the address and password, I cannot confirm them using the Autenticator application. It's an absurd cycle. The mistake was that I didn't set another email address as a secondary one. Does anyone know how to contact a live person and get help or what to do in such a situation?

<Moved from Office/Access>