You mean only the elect have the chance to repent if they fall ?
no God wills all men everywhere to repent. The elect are those that will repent. God does not force them to repent.
The chance is offered to all whether they fall or not, only the elect will freely take it.
The invitation in Revelation is whosoever will, come and drink of the waters of life freely
Since we do not know who the elect are, we preach the Gospel to everyone
Salvation is a cleansing of sin, not a license to sin and expected cleansing later. Now is the time, today is the day of salvation
Repent for the time is near
The principle is taught in Ezekiel 3
18 If, when I say to the wicked, Thou shalt surely die: thou declare it not to him, nor speak to him, that he may be converted from his wicked way, and live: the same wicked man shall die in his iniquity, but I will require his blood at thy hand.
19 But if thou give warning to the wicked, and he be not converted from his wickedness, and from his evil way: he indeed shall die in his iniquity, but thou hast delivered thy soul.
20 Moreover if the just man shall turn away from his justice, and shall commit iniquity: I will lay a stumblingblock before him, he shall die, because thou hast not given him warning: he shall die in his sin, and his justices which he hath done, shall not be remembered: but I will require his blood at thy hand.
21 But if thou warn the just man, that the just may not sin, and he doth not sin: living he shall live, because thou hast warned him, and thou hast delivered thy soul.
and again in Chapeter 18
21 But if the wicked do penance for all his sins which he hath committed, and keep all my commandments, and do judgment, and justice, living he shall live, and shall not die.
22 I will not remember all his iniquities that he hath done: in his justice which he hath wrought, he shall live.
23 Is it my will that a sinner should die, saith the Lord God, and not that he should be converted from his ways, and live?
24 But if the just man turn himself away from his justice, and do iniquity according to all the abominations which the wicked man useth to work, shall he live? all his justices which he hath done, shall not be remembered: in the prevarication, by which he hath prevaricated, and in his sin, which he hath committed, in them he shall die.
25 And you have said: The way of the Lord is not right. Hear ye, therefore, O house of Israel: Is it my way that is not right, and are not rather your ways perverse?
26 For when the just turneth himself away from his justice, and committeth iniquity, he shall die therein: in the injustice that he hath wrought he shall die.
27 And when the wicked turneth himself away from his wickedness, which he hath wrought, and doeth judgment, and justice: he shall save his soul alive.
28 Because he considereth and turneth away himself from all his iniquities which he hath wrought, he shall surely live, and not die.
29 And the children of Israel say: The way of the Lord is not right. Are not my ways right, O house of Israel, and are not rather your ways perverse?
30 Therefore will I judge every man according to his ways, O house of Israel, saith the Lord God. Be converted, and do penance for all your iniquities: and iniquity shall not be your ruin.
The teaching of Once saved always saved contradicts the word of God on this issue. But you ask are not the elect predestinated for heaven?
yes they are, but who are the elect and how do you know that you are one of them? We ask ourselves, are we doing penance for our sins, or do we act as though we have a license to sin? The elect know there is no license to sin, they do penance and ask God for grace to keep them from sin, not expecting to be saved while in the habit of sin
If we are merciful, we will have mercy shown us, if we forgive we will be forgiven. The promise is not if we condone, our behavior will also be condoned