HDFC Bank Credit Card — Not converting my outstanding credit amount to emi; hdfc credit card torturing me

Address:	Hyderabad, Andhra Pradesh, 500018
Website:	www.hdfcbank.com/personal/credit_card/credit_card_already_have_cc

I am using HDFC Credit Card from last 4 years, I am paying back minimum balance plus some amount them in every month. for 25 k limit i have approximately more than 50000 to them. but my outstanding always come to 25, 000, and 4 months i have requested them to convert outstanding to 1.5 Years EMI, but they did not listen me and continuously sending the bills with the penalty. now it comes 33, 000 rupees, I am very upset about them i have complained many times with their higher officials also. But they simply telling that my credit card is dont have EMI Facility, when their executivie selling card to me he did not explain anything about this. Kindly solve this issue. I am not new to HDFC I have taken bike loan, personal loan and completed all payments with NOC.