I know for absolute certain that human souls in Hell have NO CHANCE for forgiveness.
How do I know this? There is no such thing as hell or heaven. It's all man-made. Asking for confirmation about anything to do with Heaven or Hell is like asking confirmation about what the Power Ball numbers are going to be later tonight. They don't know... they never have and they never will.
Have you ever read the ridiculous things in the Bible? Really read them... other than the 10 popular verses they like to promote over and over. Versus that talk about owning slaves. Versus about women not being equal to men.
Face it, the Bible was made by man and there are a lot of questionable parts in it.
I believe religion was made to do a few things... explain how things came about... and to scare people into doing the 'right thing' with the fear of possibly going to hell if they didn't. So many regions have similar screen plays... I mean religions and gods.
Good luck with all that though.