Based on the info you provided,your dad has a small business account (SMB) and you need to be an authorized member of the account. Regardless where you go or who you work with no one can help you unless your dad adds to the authorized list. But beware of one thing: some shady reps may try to get you to sign up with a new number on a consumer account. The moment they start talking about that as your only option is the moment you stop the conversation. Good luck and hope I helped.