Last ditch effort on what to do.

[Synrosion]

I live in Florida, so it's normally pretty hot out, so I've had this orchid for a while. It suddenly went downhill with what I think was root rot, but it improved for a while. Until recently, it went downhill. It rotted all the roots. There isn't a single alive root, and the leaves are starting to prune up. I just put hydrogen peroxide on the roots, but I need to know where to go.