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 4475 without my concern on date: 09/10/2017 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/-

Oneassist relationship number : 2883701
Name :- dharmendra singh
Mobile no. :- protected
Credit card number ending :- 4475