Hi and welcome to HCM.
It appears from your query that you are overdoing your efforts to get rid of the scar. You know our skin needs bit of rest to get its normal texture. when we are doing a lot of things then it actually cause s more of post inflammatory hypermelanosis/ post inflammatory hyperpigmenation (PIH).
Other wise also from your query it appears to be two problems- the one is Scar and the other one is Pigmentation. You might get some relief in pigmentation but to get rid of scar is really difficult one.
The very first thing you should do is - kindly stop doing any thing for a period of at least 3-4 week. As it will come out i its natural shape so would be better to be analyzed for pigmentation.
You can try use azelaic acid cream, Kojic acid
cream, glycolic acid
cream, licorice extract or arbutine under medical supervision.
The last option would be Fraxel Laser
by an expertize hands who can judge your situation and can go for it accordingly.
Hope this information will help you out of your problem.
With best skin wishes,
Dr Sanjay K Kanodia