Thank you for using Apple Support Communities. It's my understanding the verification for your updated information is going to the wrong number. I am happy to help get this resolved.
Based on the information you've provided it sounds like you're using Two-factor authentication. You can edited your trusted numbers using the steps below:
Two-factor authentication for Apple ID
- Go to your Apple ID account page.
- Sign in with your Apple ID.
- Go to the Security section and click Edit.
If you want to add a phone number, click Add a Trusted Phone Number and enter the phone number. Choose to verify the number with a text or phone call, and click Continue. To remove a trusted phone number, click next to the phone number you want to remove.
Have a wonderful day!