Complex sentence: A commission after the fighting was over, paid ransoms to "Ittihad-e-Islami" commanders for the release of 80 to 200 Hazara prisoners, nonethelss, some 700-750 Hazara prisoners never returned, and were presumably killed or died in captivity.
Split into simpler sentences: A commission after the fighting was over was able to pay the ransoms for about 80 to 200 Hazara prisoners to be released. The ransoms were paid to "Ittihad-e-Islami" commanders who were holding them, nonethelss, some 700-750 Hazara prisoners never returned, and were presumably killed or died in captivity.