@Fliper50
I had a similar issue back in 2017 where i needed a security file of a DEX where i had a lot of coins stored.
I had to hire a professional law company which was quite expensive $17k in total back in 2017.
It was a letter battle that took nearly 3 months but my account got finaly restored active.
All i can say based on my reading is that you hired the wrong person who has clearly no real experience at all.
Him stating that you have a chance recovering it online is a simple blatant lie.I can feel why googleads is upset with that claim because the chances are none and there is not even the smallest possibibilty to recover it online.
Everyone claiming otherwise is a liar or has no clue what he is talking about and i talk based on my own personal battle with google.
Other than you i even had some details of my account,phone ,login and password and still was not able to login but always were redirected to the login page after a successfull login and sms verification
What i could not provide was date of birth and name since i added some mistakes to not provide full details which after many years i simply forgat what i entered.
Hope you recover your account.
Greetings Thule