Mobikwik — fraud transaction from debit card

I wish to bring to you notice on 17 th sep 2018 using my debit card person called from [protected] and [protected] told that she called from sbi asked fordebitcard number and onetimepassword.my mother attended the call as she has not much knowledge about internet banking process.she was easily duped and gave off the debitcard number.as soon as the call was over she got sms from the bankstating that thetransactions of the amount rs21000 twice was made from mobikwik.com.we blocked the card as well as given complaint to the bank manager.localpolice.filed for.also filed a cybercrime complaint.so that it couldbeaborted an earlier.will you help me in getting back my money