Detol is a irritant liquid for soft skin. Remember that you can only wash any area with detol for make it bacteria free, nothing else.
It made irritant contact dermatitis
near to chemical burn
on your face.
You are on the right way of treatment.
But if all these measures failed to remove dispigmentation on your face then
You could try chemical peel or laser
from a renown dermatosurgety center.
Hope you will regain a fair face.