Managing personal Outlook.com account settings, security, and privacy
Thanks for your reply. I see you have already tried several steps and I understand the effort you put into this.
Is your phone number still active and able to receive other SMS without issues?
Since SMS has been blocked for this long, it is no longer a temporary delay but a restriction on that verification method. The only supported path is to retry the Microsoft Account Recovery using a familiar device and network, and enter more precise details like past passwords and recent email activity, and if possible, wait at least 24 hours between attempts to improve the result.