HDFC Bank — hdfc credit card - cancellation of one assist membership

Address: 560066

I am hdfc bank credit card holder.
The hdfc bank auto debited the bank has auto debited rs. 1399/- from my credit card number ending with 2485 without my concern on date:03/10/2017. 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.1399/-
Please i dont what this plan cancel as soon as possible.

Oneassist relationship number : 2859681
Name :gowtham
Mobile no. :-[protected]
Credit card number ending :-2485