God leaves it up to us to decide, He does not take our free will away.
Yes He does not want any of us to perish, we though are given that choice to accept the Holy Spirits guidance or not.
Yes He will send help as in other people to talk to, lift them up, edify them. Once again through free will they can choose to refuse that help and guidance from the Holy Spirit or another person in Christ.
If a believer has fallen away, he has already fell from their saved state. The only way to return to it is through repentance and asking forgiveness of that sin.
Once again I will mention the sower and the seed parable.
( The group that abide in Christ tell a trial or tribulation happens in their life that turns them away from Christ. )
If this could not happen then our Lord Jesus would not have mentioned it.
We can not say that some one who believes in the Lord, can not turn away from the Lord.
It happens, the bible says it happens.