HDFC Bank — my money in credit card got deducted without my permission

Address: Bangalore, Karnataka, 560077

Hi every one,

Am vishwas. R, i took an credit card from hdfc. I did not opt for any credit shield policy but they deducted my money. I need to know when they dont have concern to ask my permission without billing me for useless amount charged. I will take this to higher level if am not refunded with 878 rupee.
If any hdfc officials are reading this message get back to me. My number [protected].