Nobody here is from Apple. Nobody here can directly resolve your problem “from the back end”. All we can offer is advice and technical guidance.
All contributors within the Apple Support Communities are end-user customers of Apple, just like you. These Community pages are where you come to seek help from other knowledgable end-users, who try to help where they can.
As for your immediate problem, If you have failed to properly configure your AppleID account with multiple recovery email addresses and trusted telephone numbers - and are now unable to self-recover your AppleID - your options are very limited.
Ultimately, it is your responsibility to configure and maintain your AppleID account, keeping your recovery details up to date.
Your remaining option is to locate and produce to Apple the original sales invoice, that clearly shows the device serial number. If you have adequate proof of ownership of the iPad, Apple might assist in reseting your iPad. Recovering access to your AppleID account - and all associated App and Service purchases that are forever tied to it - is something else entirely.
The link to Contact Support is at top-right of this page. I wish you the best of luck in resolving your problem.