How to generate  distinct values in a column with comma separated using LISTAGG function  in Oracle

with data as
  (
   select  BNU_USER, 

              STATE,

              DISTRICT_NAME,

              listagg(VILLAGE_NAME,',') within group ( order by VILLAGE_NAME) VILLAGE_NAME,
              listagg(PINCODE,',') within group ( order by PINCODE) PINCODE
 from     sanchar_saathi
 where   BNU_USER<>'NA'
 group   

by BNU_USER, STATE,DISTRICT_NAME
   )
   select BNU_USER, STATE,DISTRICT_NAME,
   regexp_replace(VILLAGE_NAME,'([^,]+)(,\1)+', '\1') VILLAGE_NAME,
   regexp_replace(PINCODE,'([^,]+)(,\1)+', '\1') PINCODE   
  from data;