Google — Authentication process

I am unable to login to my google account because it is requiring not only my password but an authentication code that is being texted to my google voice number which is impossible to access without being logged in to the very email that I am trying to access making it impossible to get the google code. Now, I am not only unable to access my personal and business email, my google voice, my 20+ domains, but also my play store subscriptions. I have no way to manage them. Even though the password I am putting in is correct this flawed authentication process is making it absolutely impossible to access my account by any other means. I have chatted numerous times, talked by phone and emailed with no plausible solution being provided. This is a severely flawed process, that after spending many hours researching and trying to solve I have found that many others have found themselves stuck in the same ridiculous predicament. Google knows if a phone number is associated with an email address, so why in the world would that be part of the authentication process if they know it is impossible to access the code without being logged into the very account you are trying to authenticate. They offer no other means (security questions, etc) to recover the account.