HDFC Bank — please deactivate and refund my money

I had received sms from hdfc bank 27th december 2019, which says that rs 1899/- deducted from my credit card to one assist membership fee.
As i had already informed to cancel my membership they not cancelled and without informing me they illegally deducted above said amount from my credit card. I had seen many cases of such kind from your one assist agency. I want my money to credited back to my account at an early date. If not i will sue you legally in consumer forum for illegally deducting my money.

Deactivate and refund my money immediately... You will be liable for further legal consequences.

Name : maddela srinivas
One assist relationship no:5998890
Hdfc credit card number xxx0976