Ok, it's not just about bounce flash: the background has been transformed into colour negative. It's an interesting idea, but it immediately created a distracting edge effect where the model has been lifted out and pasted back, to save her from being negatived.
Second thing: the point of bounce flash is to avoid looking like there was on-camera flash. But the reflections in her eyes and off her cheek bones still say "on camera flash". What happened? What was the flash meant to bounce off?
Was there any designed lighting? Ie spots, floods etc set up by a lighting designer? There is something to be said for capturing the look the lighting designer has tried for, rather than fighting against it. The result may not be "easy" or conventional (strong shadows, false colours etc), but it will look like what it was. That will at least be more interesting that the rather bland look the model has here
But maybe you only had shopping centre commercial ceiling lighting?
If I were pompous enough to give advice (obviously I am, but up to you to treat it seriously or not), it would be to take your flash and stuff it way down the bottom of a bag where it is hard to access, then bring it out only where it's really necessary (ie 6400+ ISO and image stabilisation and f/2.8 are not doing it, or you have only the dreaded ceiling neons).