Please read Acts of the Apostles 2:39 and Romans 8:30 several times in prayer. Consider that Acts of the Apostles 2:39 declares that it is a promise (I will say conditional based on the context) that is given to as many as the Lord our God shall call.
I don’t believe Acts 2:39 is Calvinistic if that is what you are implying.
I believe God does call us in the right point in time in our life but it is up to us to decide of our own free will to accept Him and His word.
John 12:48 teaches that we must not only receive Jesus, but we must also receive His words. For if we do not receive His words, those words will judge us on the last day.
As for Romans 8:30:
Protestants tend to view the word “justified” as in reference to their version of Justification that was handed down from their Protestant Theologians in that it removes all penalty of sin. But this is false.
In addition to believing in the blood that saves (According to Romans 3:25), we also have to believe 1 John 1:7, too. 1 John 1:7 teaches that you have to walk in the light for the blood of Jesus to cleanse you from all sin, as well.
Anyways, the word “justified” is in reference to both being saved initially by God’s grace through faith without works (Romans 5:1-2), and by works in our continued salvation or faith via by the Sanctification by the Spirit (James 2:24) (Also see Romans 8:13, and 2 Thessalonians 2:13).
For faith starts off as a belief alone, but it does not remain that way.