If you have the Copy Brokerage offered as 2/20 then along with the statement.... send them an email....asking for immediate credit of all the excess... charged including other things as service tax & etc...

Important thing: At the bottom write 'CC: SEBI' even if you don't really send it SEBI this time....

If you get no reply withing 2-4 days... then file a complain with all supporting documents online with