Unless you're the original owner, nothing you do will secure the account. That's just how the game is.
If you want to have a good, secured account, make an account yourself and pay for it to be leveled. It's going to cost more but you can know that the leveler can't hack into it. As long as you have the right things set up, they can level while you're still in full control of the account.
That's the only safe way that I tell people. Otherwise it can always be recovered.