I am very angry about this because I didn't save the wallet.dat in another device. I was told by the lab that the file is irrecoverable.
If you have the old wallet.dat, even if it is corrupt and unusable as is, you could try to click: Tools - Wallet Repair - Salvage wallet
to try to recover some private keys from it.
You mean is there's a way to recover a corrupted dat file? I remembered that I already asked it before here, because i have a corrupted dat file, there is a 10 btc2 in this wallet, so the retrieval is simple as that?