HDFC Bank — Regarding extra charge for credit card

Address: HDFC vijay nagar branch

Hi team, i activated my credit card before 3 months and added my vodafone postpaid bill on smartpay through my hdfc advisor. Rm - apoorve tiwari (Hdfc indore branch) they asked me to pay vodafone bill within 1 year through credit card to make it free of cost. I followed the same thing. But now i got my credit card bill in which it is showing addition credit card charge as well. They said that we will take responsibility and all our conversation has been recorded so you dont worry otherwise i was not interested for credit card but they forced me. Kindly assist for the same.