i have come to serious problem where i cannot use my holy avenger because i have become a fallen palidan as well as one of my charecters a fallen archer...i could use some knowledge on how to fix me

Reload, 'cause they are just fighters now and will stay that way forever.

I've hear of an unholy avenger that can only be used by anti-palidins so I say become an anti pali.

The unholy avenger is a dud weapon. Nobody can use it. Also, a fallen paladin isn't an anti-paladin, it's just a crappy fighter who can't go past specialisation in any weapon.

Well, that just sucks now doesn't it?