HDFC Bank Ergo General Insurance — Cancel of insurance plan and refund money

Address: 9133

I am chayan das a hffc credit card holder. The sales exicutive sold me a health insurance plan after a lots of arguments the sales team has no manner they speak in such way that they are helping me by selling the policy. I asked them twice or thrice but repetedly they said that after my confirmation they send me a policy bond and after receving i cancel it anytime. But i come to know that it is not mandatory to say ok and they also given me wrong information to do the policy. It is too much. I request to cancel the policy which emi is not start yet and refund the entire amount which was debited from credit card a/c. I think the policy is bad and also customer service