Hello, my name is ***** ***** I will be assisting you today. I don't know if you have tried this yet, but Google does have an account recovery form you can fill out. It is referenced in the following link:
I don't know if you have 2-step verification enabled, but there is some good information on how to get help in this type of situation.
The following link is also for account recovery. I expect you have already seen this, but here is the link:
Also, do you happen to have an alternate email address you provided in your account? They can send recovery information to that as well.
Let me know if this helps.