Hi @Alaa Ahmed
Thank you for reaching out to Microsoft Q&A Support and I apologize for any inconveniences caused by this issue.
May I know if you are still able to sign in to your account using any alternative methods?
If yes: you could access this link: https://mysignins.microsoft.com/security-info to change your old phone number and change the verification method
If not, kindly Call to Microsoft Hotline - Customer service phone numbers - Microsoft Support to get the support
Hope you will solve this problem soon.
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