Bally Municipality — Change of name in birth certificate

Address:

5/4/1 guha park

I have change my both son and daughter name and all legal formalities are done.
name of my son in birth certificate are change by kolkata municipal Corp but unable to do the changes in daughter birth certificate, please advice where to go for correction .

my daughter name is disha lohia but mention gungu lohia in birth certificate

my no [protected]