HDFC Bank — cancellation of one assistant service on my hdfc account

Address: Bangalore, Karnataka, 560030

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 6470 without my concern on date:08/10/2017. I am not interested about this service and don't want this membership any more. So cancel the membership and refund debited amount of rs.1299/-

Oneassist relationship number : 2870859
Name :- shashi kiran g
Mobile no. :- [protected]
Credit card number ending :- 6470

Oneassist customer care people where disconnecting call when i was saying about cancellation of this service... Disappointed
Hdfc bank was careless without my proper acknowledgment how can you activate such services for my card from past 7 days i'm trying to reach concerned person.. Bank assist me to call oneassist customer care but oneassist people say bank only assisted us to activate this service...