Hello my name is ***** ***** certified computer professional with over 10 years experience. I will be happy to help you.
I have read your previous question on this matter and I am going to be very up front about your issue as I know you have spent a lot of time on it. First, google makes sure that accounts are kept secure however they leave this up to the user. to remember things like paswords and or backup codes for two step If you were using two step verification in this account and no longer have access to the phone and do not have the back up codes you do not have many options. I will be blunt to save you some time, it is possible to lose access to an account, simple as that.
I have done thousands of password ***** for customers on gmail and am very familiar with how the process works and I am going to share that information with you but keep in mind there is no way I can get you back into your account, you will need to have the knowledge about the account in order to proceed with a password *****
Remember Gmail is a free service so there is not a way you can just call and verify your identity by your billing information.
Please follow these instructions.Please read through them once before you try so you understand. Go to the following link to begin the recovery. https://accounts.google.com/RecoverAccount?fpOnly=1.
Enter the account you need access to, type the characters in the distorted image, and click the link at the bottom of the following page to verify your identity and access the form.
Then you need to answer these questions, When was the last time you were able to sign in to your Google Account? (take your best guess)
When did you create your Google Account? (take your best guess try and get at least the year correct)
Email addresses of up to five frequently emailed contacts (name as many as you can)
Name of up to four labels or folders in your gmail account (name as many as you can)
Select up to 4 other Google products you use with this account, and the approximate date you started using them. These could be things like youtube or google plus.
What is most important is you do not guess. You need to provide as much correct info as you can.
So if you do not know something skip it but try not to skip everything or they will not let you in.
Take time to fill out each section of the form to the best of your ability. It was designed to ensure that no one can gain access to your account except you. If you cannot remember the exact dates of you started using gmail or the last time you used it take your best guess. Since Google doesn't collect a lot of information about you when you sign up for an account, they will ask you questions like when you created your account, what Google services you use, and who you email frequently. If you fill out the recovery form and are not successful on the first try, you can try again. Make sure to wait until you receive our reply before you submit another report.
Important: Try to provide as much information as possible on each attempt. Each submission is evaluated independently. You may need to go through this a couple of times. Fill in the information the best you can and try not to leave too much blank. The questions we ask to verify your identity are intentionally difficult. Answer as many questions as possible, and make sure your answers are accurate. If you're unsure about an answer, provide your best guess. If you fail 3 or 4 times in a row you may be shown an option to have a representative call you to help more, this is not always the case but I have seen it happen with my own eyes.
Now if you feel there is no way you will be able to complete the form to their satisfaction I would then seuggest as a last attempt you reach out to them on their support forums here https://productforums.google.com/forum/#!forum/gmail , moderators do read these and may be able to provide additional help.
I am really sorry there is not more that I can do but this is unfortunately one of the downsides to using a free email service, when you have an issue such as this you cannot just call someone and confirm who you are by your billing information.
I hope you are able to get back in. Please do me a favor and take a moment to rate my service by clicking the stars above, 3 or more is very appreciated. Remember you are rating me personally and not gmail or their procedures which I understand are very frustrating.