Dear Ms Praga
Meladerm cream is used for pigmentation marks. Acne can cause scars
as well as pigmentation marks. You need to understand the fact that only pigmentary problems can be treated with cream mentioned and for deep pitted scars you need a treatment like Fractional Laser
. The laser option gives a better result in comparison to dermaroller. 2-5 sittings might be required depending upon the depth and extent of scarring.
In my advice you must visit a qualified dermatologist
for the same.