
Hi there,
I'm Cherrelyn, and I'm here to help.
Please try to clearing browser cookies or using a completely different device/network to trigger the SMS option again. If that fails, you’ll need to work with Microsoft support to escalate for manual identity verification they can bypass or reset the 2FA method once you prove ownership with things like billing info, recent sign-ins, or purchase history.
I hope this will help and if you have any question please feel free to ask.
Warm regards,
Cherrelyn