Our Lady of Medjugorje tells us that hell exists. Here's what it says

Message dated July 25, 1982
Today many go to hell. God allows his children to suffer in hell because they have committed very serious and unforgivable sins. Those who go to hell no longer have a chance to know a better fate. The souls of the damned do not repent and continue to reject God. And they curse them even more than they did before, when they were on earth. They become part of hell and don't want to be freed from that place.
Some passages from the Bible that can help us understand this message.
2.Peter 2,1-8
There have also been false prophets among the people, as well as there will be false teachers among you who will introduce pernicious heresies, denying the Lord who redeemed them and attracting a ready ruin. Many will follow their debauchery and because of them the way of truth will be covered with impropèri. In their greed they will exploit you with false words; but their condemnation has long been at work and their ruin is lurking. For God did not spare the angels who had sinned, but precipitated them into the dark abysses of hell, keeping them for judgment; he did not spare the ancient world, but nevertheless with other sects he saved Noah, auctioneer of justice, while making the flood fall upon a world of wicked; he condemned the cities of Sodom and Gomorrah to destruction, reducing them to ashes, setting an example to those who would live impiously. Instead, he freed the just Lot, distressed by the immoral behavior of those villains. The righteous one, in fact, for what he saw and heard while he lived among them, tormented himself every day in his soul just for such ignominies.
Revelation 19,17-21
Then I saw an angel, standing on the sun, shouting loudly to all the birds that fly in the middle of the sky: “Come, gather at the great banquet of God. Eat the meat of the kings, the meat of the captains, the meat of the heroes , the meat of horses and riders and the meat of all men, free and slaves, small and large ". Then I saw the beast and the kings of the earth with their armies assembled to wage war against the one who was sitting on the horse and against his army. But the beast was captured and with it the false prophet who in his presence had operated those portents with whom he had seduced those who had received the mark of the beast and had adored the statue. Both were thrown alive into the lake of fire, burning with sulfur. All the others were killed by the sword that came out of the Knight's mouth; and all the birds were satisfied with their flesh.
Luke 16,19: 31-XNUMX
There was a rich man, who dressed in purple and fine linen and feasted lavishly every day. A beggar named Lazarus lay at his door, covered in sores, eager to feed himself on what fell from the rich man's table. Even dogs came to lick his sores. One day the poor man died and was brought by the angels into Abraham's womb. The rich man also died and was buried. Standing in hell amidst the torments, he raised his eyes and saw Abraham and Lazarus from afar beside him. Then shouting he said: Father Abraham, have mercy on me and send Lazarus to dip the tip of his finger in the water and wet my tongue, because this flame tortures me. But Abraham replied: Son, remember that you received your goods during life and Lazarus likewise his evils; but now he is consoled and you are in the midst of torments. Moreover, a great abyss has been established between us and you: those who want to go from here cannot, nor can they cross over to us. And he replied: Then, father, please send him to my father's house, because I have five brothers. Admonish them so that they may not come to this place of torment too. But Abraham replied: They have Moses and the Prophets; listen to them. And he: No, Father Abraham, but if someone from the dead goes to them, they will repent. Abraham replied: If they do not listen to Moses and the Prophets, they would not be persuaded even if one rose from the dead. "