Remove is going to nail the mic part, but that wire is going to be tricky.
For removes, the BG shape needs to be large and it needs to cover the FG remove shape completely, so that’s probably what you are seeing.
If possible… try cheating. You might be able to get away with a “stuck to her sweater” roto shape and then offsetting the pixels. I am seeing a lot of subtle shadows across the bottom of her torso that looks like it will really stink to fix. I wouldn’t keep the wiggle in, just make the shape big enough to cover the mic wire while sticking to the sweater so it is less obvious.
Consider trying SIlhouette Paint for this if the roto shape doesn’t work out. It might just be faster to hook rotopaint up to a track to fix this, the subtle shadows are going to be really difficult even with illumination modeling.
If the remove still isn’t looking right it’s almost certainly the track and those shadows and perhaps occlusions passing through your BG shape.
Anyway, try the roto offset for the wire and the remove for the mic and let me know.