If you expect help, you need to explain what exactly happened, and not have people guess if it was this or that.
I have had two occasions of missing keys for wallet which has make it difficult for me to recover my wallet and capital and the worst of it is that most of this Apps is frustrating in recovering wallet address.
Apps don't frustrate users when recovering their wallets. You didn't back up you seeds properly. We don't back up individual private keys nowadays. Most wallets are HD wallets where you back up a set of usually 12 or 24 seeds, also known as the recovery phrase. That's your backup. You write it down physically exactly as it's displayed to you on the screen. If you didn't do that at all or didn't do it properly, you only have yourself to blame.
So why don't you start again and tell everyone what it's that you need help with?