Hello Doctor, I (F/24) Have Acne Problems (face And Shoulders/back).

Hello Doctor,
I (F/24) have acne problems (face and shoulders/back). I have taken treatment before. The scars had decreased then. If I remember correct, I had taken Erythromycin, Benzoyl Peroxide cream etc). I had stopped for a while, new acne emerged.
At present, I use Benzoyl Peroxide 2.5 w/w% when an acne emerges. However, my scars still remains. What would you suggest me to use for scar removal? I have a patch of scars on both cheeks and scattered dark spots on forehead. I will be happy to address any further description if required by you.

Thanks