Debit card bank refusing to fllow bank code no 12.6 and denying reposnibility to repay in case of theft

bank refusint to follow bank code 12.6 . bank issued me authorised debit card. which is duplicated by unknown person he withdrew ten thousand rs from mumbai. when i reached bank they directly refused the responsibility. when i made a writeen complaint for repayment as its a theft they at least took efforts to get cctv footages. now bank is saying i should take the cctv footage to police. where as i am saying its not my repsonsibility to go to police . its completley banks responsibility to safegaurd my money against theft,
i have copyof writeen compaint. i have received many mails from bank denying the repsonsibility. my number is 0 9273607078
please help me out