One Assistant Services — unauthorized debit card charges

Axis bank ac. No.*4178 name :lalisetty murali date of incident:09/10/2017. I got a call from one assistant services about the insurance policies concerned with my axis bank debit card. Without much knowledge one of my family members who attented the call agreed to the concerned employee and later i got a message that my card was debited with 1899 rs. I am not at all interested in this plan. So kindly refund my money. Thanking you