There is always hope!!! Being the freak that I am, I have put zoas colonies into pee cups and let them float in my sump for several weeks, never opening the lids. Then when they come out they are quite scraggly and light starved but once they recover they grow as normal. Why have I done this......well experimenting trying to make things morph into something different via stress
What I would do with yours is maybe do a real light (half of recommended amount) coral dip like revive and then put that sucka in some high flow