HDFC Bank — Cancellation of one assist service.

I am hdfc bank credit card holder and my credit card number ending 9809. I had reported the fraud of purchase from my card and asked to block it, that time they told me about one assist and they told total fee will be rs.1899 for one year but now they debit rs. 2999.in the statement of my credit card due to pay on 12 july 2020. I don’t want to be continue this service further. So kindly cancel it and refund the amount debited.