HDFC Bank — cancellation of one assist membership

I am a HDFC bank credit card holder . The bank has auto debited Rs. 1299/- from my credit card number ending with 2602 without my concern on date:31/07/2017. I am not interested about this service and don't want this membership any more. So cancel the membership and refund this debited amount of Rs.1299/-

Card loan Number : 293260
Name :- Shayan Saha
Mobile No. :- [protected]
Credit Card Number Ending :- 8666