verification code is sent to wrong phone number

Hello pikea97 and welcome to Apple Support Communities. It appears you are having some difficulty with a two-factor authentication verification code for your Apple ID.

Get a verification code and sign in with two-factor authentication

You'll find all of the supported methods for receiving that code in the resource linked above.

Cheers.

Look in the Security section when signed in online. You need to change/add the number on your Apple ID. You may have to add the new number before you can remove the old number. After the change, allow up to 24 hours for the change to sync. Before trying to make the change, sign out of Messages/FaceTime on all devices/computers.

Apple ID - Manage