Citibank Credit Card Complaint

Citibank Credit card department,

Late fee Rhode Island

After ( at least ) over a year of consistent, on time, payments to Citi Cards for my credit card, I was assessed as being two days late on my credit card payment -/-/-. I have been charged $27.00 for a late fee. I requested a waiver of the late fee, which Citi Cards has refused to grant. This seems highly unfair - other companies are willing to waive a late fee in situations where the customer has been consistent in making payments. I would like Citi Cards to waive the fee.