Citibank — fraud - without informing my bank account has been shifted to another category

Address:

Gurgaon, Haryana, 122001

Hi,

My salary account is in citibank. Since last year everything was okay but suddenly they are asking me that my account required a minimum balance of 1 lakh other wise they will deduct money from my account. When i asked the reason then they confirmed me that my account is no more salary account. However my salary is still getting credited in this bank account. I don't know what to do about their monopoly.