I don't know if the OP is the real account owner. But, Suppose he is the real owner. What if he can't find the backups?
I think it's a reasonable assumption not to gamble with everything you own. By losing his wallet backup, he lost access to all his coins except for the small amount on Stake. That's just the reality of what happens when you deal with crypto without making a backup.
Or, and that still can't be ruled out: he's not the original account owner. If that's the case, we can't know what happened to the real owner. Giving access to the wrong person can't be undone.
Take me for example, I love to travel a lot. Most of the time, I use my mobile device's note text file to save 12-word seed phrases.
Did you ever read the "don't do that" warning that virtually every wallet gives you? What you should do is create a wallet when you're at home, create a backup and keep it securely offline, leave it there, and travel with no more on a mobile device than you need and are willing to risk.
I use multiple wallets like coinbase, Binance, So I guess I can recover my account easily if have my Simcard. But, If I lost my text file, I can lose access to my Meta Mask wallet.
So anyone who gets access (either physical, or through an app) to your phone can do this too.
Somehow he could lose the backups too. That's why he is here.
That means he missed the very basics of "not your keys, not your coins".
Suppose, He is not the real owner of the account and the email was compromised. Still, Do you believe all those highlighted information can be provided by others without a real account owner?
Maybe. Maybe not. For reference:
Update: Our front-end provider was social engineered. An administrator that works for this major company granted a random person's account access, something we did not even think was a possibility (google, facebook amongst others use our provider to some extent).