No one has ascended to heaven but He who came down from heaven, that is, the Son of Man who is in heaven — John 3:13, NKJV

   Contradicted by:   

Then it happened, as they continued on and talked, that suddenly a chariot of fire appeared with horses of fire, and separated the two of them; and Elijah went up by a whirlwind into heaven — 2 Kings 2:11, NKJV
(Elijah ascended), and..

And Enoch walked with God; and he was not, for God took him — Genesis 5:24, NKJV
(Enoch ascended)