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 8634 without my concern on date:18/11/2017. Neither oneassist took my concen before activation. Frustrating is, my card is still in transit and i got sms about debiting. 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 : 3108419
Name :- sunil kumar yadav