Consumer Redressal

I had instructed HDFC on 29th December 2014, to block my HDFC credit card# 5241810400069431 due to security concerns. At the time of applying, I was told by the Credit Card Agent that this is entirely a Free card as I will be a corporate customer, currently employed with Cognizant Technologies Solution India Pvt Ltd. The Credit Card January 2015 Statement clearly depicted that my total amount due was Rs. -19.90 (i.e. The Bank owed me an amount of Rs. -19.90). I even double checked the same from HDFC Bank Customer Call centre representative who clearly stated that I do not have any amount due. I have not used the card since, nor have I asked for any kind Card Renewal or Re-issuance. Yet I have received a Credit Card February 2015 Statement showing that total amount due is Rs. 541.90 and a "MEMBERSHIP FEE INCL ST AND CESS" has been charged. It appears that HDFC Credit card department is fooling people without giving complete information. It would be great if you can help.