I halfway agree. God’s Salvation is eternal. It is impeccable. It is undeserved, and can’t be earned.
It is a gift freely given by God. If we reject God, that is turning away from His gift of Salvation.
We reject God every time we sin. Fortunately, we can seek His forgiveness, and return to Him.
However, if we die resisting God, then Hell is our reward.
Salvation never goes away, but we are always able to reject it.
No, no born again believer goes to hell over sin.
There is a difference between choosing to sin and outright rejecting God.
Salvation is not on again and off again. That's salvation by works, not grace.