Need to change my phone number in Windows Olympia account

Hello. I changed carrier and phone number, but I forgot I have one of those numbers associated with windows olympia account. I know password, the primary account is also associated with windows olympia account which I have access to, but when I want to login, it wants 2FA by phone number which I don't have anymore.Can you help me with it? thank you

Case number: 1034414555