Repotting for the first time

[hatter]

Hi Everyone

After posting on the diseases and pests forum my Phal was diagnosed with rotting roots so it need an emergency repot. I have bought some bark and some cinnamon and my plan is to cut off all the rotting leaves and roots, use cinnamon as a anti fungal and then repot. Its in bloom but I think this has to be done before the whole plant rots. Should I cut off the bloom? Any hints and tips appreciated. Photo of the roots below...