HDFC Bank — Credit Card Unauthorized payment

Ancellation of One Assist Membership
I am a HDFC bank credit card holder . The bank has auto debited Rs. 1399/- from my credit card number ending with 2602 without my concern on date:31/08/2020. 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/-

OneAssist Relationship Number : 11323400
Name :- Ajmal Muhammed K V
Credit Card Number Ending :- 9906