There is so much wrong here. First of all, nobody is in Heaven, as Jesus clearly said Himself in Jhn 3 that no human being besides Himself was ever going there.
Explain how Paul's testimony indirectly about the apostle John's trip to Paradise in Heaven for the Book of Revelation?
2 Corinthians 12:1It is not expedient for me doubtless to glory. I will come to visions and revelations of the Lord. 2 I knew a man in Christ above fourteen years ago, (whether in the body, I cannot tell; or whether out of the body, I cannot tell: God knoweth
such an one caught up to the third heaven. 3 And I knew such a man, (whether in the body, or out of the body, I cannot tell: God knoweth
4 How that he was caught up into paradise, and heard unspeakable words, which it is not lawful for a man to utter.
Revelation 1:9 I John, who also am your brother, and companion in tribulation, and in the kingdom and patience of Jesus Christ, was in the isle that is called Patmos, for the word of God, and for the testimony of Jesus Christ. 10 I was in the Spirit on the Lord's day, and heard behind me a great voice, as of a trumpet, 11 Saying, I am Alpha and Omega, the first and the last: and, What thou seest, write in a book, and send it unto the seven churches which are in Asia; unto Ephesus, and unto Smyrna, and unto Pergamos, and unto Thyatira, and unto Sardis, and unto Philadelphia, and unto Laodicea.
Secondly, Dan. 12, Psa. 17., and Job. 14 all show the OT saints' faith were in the resurrection of the firstfruits, not going to Heaven.
Jesus is warning the churches about false prophets for why believers need to be ready before He comes as the Bridegroom or else be left behind.
Luke 13:24
Strive to enter in at the strait gate: for many, I say unto you, will seek to enter in, and shall not be able. 25 When once the master of the house is risen up, and hath shut to the door, and ye begin to stand without, and to knock at the door, saying, Lord, Lord, open unto us; and he shall answer and say unto you, I know you not whence ye are: 26 Then shall ye begin to say, We have eaten and drunk in thy presence, and thou hast taught in our streets. 27 But he shall say, I tell you, I know you not whence ye are; depart from me, all ye workers of iniquity. 28 There shall be weeping and gnashing of teeth,
when ye shall see Abraham, and Isaac, and Jacob, and all the prophets, in the kingdom of God, and you yourselves thrust out. 29 And they shall come from the east, and from the west, and from the north, and from the south, and shall sit down in the kingdom of God. 30 And, behold, there are last which shall be first, and there are first which shall be last.
Note the sitting down in His kingdom as inferring the Marriage Supper of the Lamb in Heaven with those abiding in Him along with O.T. saints.