I tried in both way but via phone when I insert both the number registered on the account I get an error massage "this EMAIL ADDRESS is not valid to update you email address visit..." but first it's a phone number and you can't even insert letters, furthermore it's the number associated to my account. I tried also by mail but the form is stuck after hitting send and i never received a reply anyway. Today I received another reminder via mail: Dear Tommaso, Thank you for your interest in the Apple Developer Program. We'd like to continue your enrollment, but we still need the documentation we requested last week in an email titled “Request for Enrollment Documents”. Upload Documents. If you have already provided documentation, disregard this notice. Please contact us if you have questions. Best regards, Apple Developer Relations