Citibank Cheated me
Wrong bill calculation

I made citibank payment time to time, then also they charged me late fee, i made the late fee payment also, but now they are sending me statement of high amount, i didnt purchased any thing but than also they are sending monthly statement, when i asked for fax no so that i can fax them all the details the didnt gave me, and told me that they will call me for further clarification, but nothing happened yet.(they are sending me monthly statement since last two months)