Hi..
I`m Peter, an experienced audio freelancer /30+yrs in work/.
For such voc-removing postproduction tasks I use in my audio-studio set of professional tools from Adobe Audition, Izotope as main software + additionally few designated for it plugins from Sony, and more.
Pls send me piece of your source audio, I`ll do short demo-piece of what I can get (=I`m serious man, I don`t promise miracles- I `ll do all best what is available, but (as - hope- you know too) such edits have influence on entire audio, and results depend on how vocal is placed in track...
let`s chat about it all, then once you `ll be happy - we can start..
rgds
Peter