Disable Volume Keys

My phone ( Micromax Canvas 2.2 - Android v4.2.2 - Rooted ) fell off from table and volume side keys got damaged. Now it is malfunctioning which causes in silencing every volume related functions. Now I m using "Volume Lock and Control" 3rd party application to avoid change in volume but volume panel screws everything. Using "Gravity Box" i made volume panel transparent but touch is still the issue. I want to disable my physical volume keys. Help appreciated.

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