How can I get rid of biopsy scar on my stomach area? (Photo)

I am 27, and skin type 3 to 4 ,5 months ago I got skin biopsy done from my stomach area, the incision Involved deep layers of skin. Now I hv a round discoloured scar with some small elevations on it . Doctor prescribed me contratubex cream but instead improving it discolored my surrounding skin around scar. Pls tell me the best and fast treatment to cure it and fade away. And how long does it takes to totally vanish away? Pls help me out.

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