Hii Friend,
First of all do not use any cream based product if you are prone to acne. Wash your face with water 3-4 times daily at least. More over these at this age if you are having acne you should check you
sugar level also.
Next Steps
In homeopathy every patient can not be cure with same medicine so if Berberis fails to give you satisfactory result rather than thinking Homeopathy is useless please consult a Homeopathic physician to get cured.
Health Tips
Avaoid addiction if any.Avoud junk foods, soft drinks, packaged foods., late night sleep.