Citibank Credit Card Complaint

Citibank Credit card department,

Other fee Illinois

Macy 's is charging me a $2.00 " Minimum Interest Charge '' fee on a - balance credit card account. They charged me the $2.00 fee on -/-/- and when I notified them in writing, the customer service agent advised I had a - balance. Now the account shows as 30 days past due and they charged another $2.00 fee on -/-/- while the balance was still - except for the $2.00 fee from -/-/-. I do not owe this and do not want this to negatively affect my credit rating.