Moto TPSL — Fraud transaction

Address:

Mumbai City, Maharashtra, 400099

I got call from mobile no : [protected] and they told me about some old bonus points and they debited Rs. 7789 in my credit card.
how to recover the payment from the team. now i am not able to speak to this team, they are not responding to my call. whom to contact for getting refund.
Amount is debited on 26th Apr'2017 in my Credit card. Please help.