RBL Bank — cheating on emi

Address:

Ludhiana, Punjab, 141010

I used rbl credit card and they send me monthly statement. I paid that amount. Next month i again done some transactions on this card. And after few days i received call from them to convert the amount in emi. I said convert only transaction done in current month. But they also converted the amount into emi from previous month which i already paid. I complaint in customer care and they give me complaint no. But its now almost 20 days i haven't get solution. And they always says to me to call after 2-3 days. I continuesly calling but not getting solution. Please help me in this matter.
Thanks.