Remove green reflection around the subject

If your Creative Cloud subscription includes After Effects, you can import the image into an After Effects project to apply Keylight to the original image, assuming that you still have it with the green background.  Then apply Advanced Spill Suppressor to remove the green spill from your image.

If the green from the original image has been deleted, you can still apply Advanced Spill Suppressor.

Keylight can be found under Effects > Keying > Keylight (1.2).

Advanced Spill Suppressor can be found under Effects > Keying >Advancd Spill Suppressor.

To return to Photoshop, choose Composition > Save Frame As > Photoshop Layers...  

It's usually a good idea to save the After Effects project in case you need to return for further adjustments, but you don't need to if you're happy with the results when you're back in Photoshop.

You may consider using Lab Color as an alternative. In the sample above:

1. Change the image to Lab Color Mode and add a duplicate layer

2. Go to Channels, choose the  a  channel where green is represented by a dark value and magenta is shown as a light value.

3. Create an Alpha channel from the  a  channel and paint as shown. Use Curves and a brush to increase the contrast and paint out areas where the green tone in the image is not to be affected.  Then invert the result. It is the mask. 

4. Return to Levels and add the mask to the top image

5. Choose Curves and in the  a  channel bisect the grid horizonally. Move to the Lightness channel and, after moving from the mask to the image prt of the layer, with the hair as a reference, darken the shadow end of the curve. (I may have overdone the darkening. See this in larger size.  Easy correction,)

6. Return to RGB Mode 

Hue-Saturation layer. Lower the saturation of yellow and green.

Decontaminate colours is destructive and often does not work well.

An alternative is to clip a new layer set to blend mode colour to the image layer. (Add your new layer above the image layer and Alt-click on the border between the new layer and the image layer) Then with a soft brush, Alt -click to pick up colour from the skin and paint around the green edges. Alt click as you go round to match the colour to the nearby skin/clothing. This will only change the colour not the luminosity.

Dave

Could you please post screenshots with the pertinent Panels (Toolbar, Layers, Channels, Options Bar, …) visible? 

Have you tried Decontaminating in the »Select and Mask«-workspace?

If that does not work out you can try using a Hue/Saturation Layer with an appropriate Layer Mask and, if necessary, do manual touch-up on a new Layer or duplicate.