HDFC Bank — there is a fraudulent transaction done on my card on 4th july of amount 19886/

This is in regards that i am a hdfc credit card holder for past 1year & above and there is a fraudlent transaction done on my card on 4th july of amount 19886/- and as i received the msg regarding same i informed the bank on toll free number and blocked the card and they blocked my card and issued a new one, i have received the new card but on 5th of july i filled the dispute form and mail it to cc.[protected]@hdfcbank.com and i haven't received any reply from there till date inspite of reminders, i mailed to another mail id customerservices.[protected]@hdfcbank.com but again no reply and toll free numbers are not geting connected and the amount is still not reveresed and its billed in my statement and payment is due.So i would request to please intervene and take action.