HDFC Bank — one time assist

Hi, i am using hdfc credit card for more than 5 years, i never opted for the service one-time assitant but it got activated automatically which charged 1899 rupees on my october statement. Spoken to hdfc credit card customer i care, where they will help me out and also spokeneassist customer care, karan who is rep ultimately useless.

I am wondering how these kind services get activated without the knowledge of customers, where this is very irritating and these kind of a things spoils the trust, long earned name of the bank.