Thanks for writing in.
You seem to have postinflammatory hyperpigmentation
For pigmentation as a general rule-
Avoid sun exposure
Use a good sunscreen of SPF 30 and repeat application every 3 to 4 hours
Take antioxidant and vitamin c supplements .
You need to consult a dermatologist
as dermatology being a visual field
, the cause for your pigmentation and the treatment required can only be suggested after proper skin examination.
As the creams have not worked few procedures like chemical peeling and microdermabrasion
can be helpful in your case.