Citibank Credit Card Complaint

Citibank Credit card department,

APR or interest rate New York

Citibank - - has increased my interest rate to 29.99 %. I understand that this is their rules when someone pays late but I was only a few days late. I see this as unreasonable punishment since they also hit you with a late fee as well. My balance on my card is only $ - out of $ - credit limit. I have been a long time customer of Citi.