Sold Her Soul...?

The young girl lay in her bed, burying the tears. She let the blood slide down her chin, not bothering to wipe it. Bruises covered her ribs, legs, chest, face. They didn't usually get her face too. Those would show tomorrow at school. She looked at herself in the mirror, then picked up the Bible that lay on her dressing table. With a curse, she threw the book across the room. Anger was quickly filling her, replacing the self-pity she'd been feeling for years - since her father married and began obeying this creature. She'd once thought the woman pure evil - but after years of God turning his back on her and her family, not bothering to try to rid the world of this evil - she realized that perhaps she had it wrong. She heard one of her siblings cry, looked upward, and cursed God. And then she prayed - to Satan. She offered her soul for her siblings to escape this hell. For her to escape it....

So is it possible for one person to sell their soul to Satan? And if they do, is there any way to get out of that contract? Can they ever be forgiven and received back into God's arms?

I found one article with a list of 10 people whom have supposedly sold their souls to Satan. These individuals did so for more money and power and prestige. And, I'm sure there are many more like this. I am also certain there are many like the young girl in the story above.

I have researched this topic quite a bit - and have read a lot that says that yes, God will forgive someone for entering into this contract, so long as he/she repents. However...
"And whoever speaks a word against the Son of Man will be forgiven, but whoever speaks against the Holy Spirit will not be forgiven, either in this age or in the age to come." (Matthew 12:32)
One would think that selling their own soul to the devil is to speak out against the Holy Spirit. One is essentially denouncing the Holy Spirit, and it doesn't matter the reasons behind that denunciation. It is unforgivable.

Going by this reasoning, it would make sense why a young child, entering into a contract without thought or consideration, would spend the rest of her life being tormented and tortured - although, one would have assumed Satan would have lived up to his end of the contract. Can there ever be peace, or love, or a life free from pain and suffering for her? Is there any point in even trying?