Acnepigmentation and scar. And scar.

I got an acne on cheek front in Feb 2015 . I picked it up. It created pigmentation on my face. I consulted homeopath in may 2015. the pigmentation improved a little bit after three months medication. then I consulted another homeopath in August 2015. She gave high potency doses to me . The pigmentation improved but meanwhile due to dose reaction I got two three cyst acne in Oct. 2015. That homeopath advised me to use coconut oil on cyst acne. I used parachute coconut oil on the acne. Acne was healed in Feb. 2016. But the acne pigmentation and scar are still there. I think coconut oil created negative effect. I have again took homeopathic medicine to remove the acne scar and pigmentation but with no improvement. If there is any medicine in ayurveda which can remove acne pigmentation and scar.