Amex Credit Card Complaint

Amex Credit card department,

Late fee Indiana

I have excellent credit and pay my bills on time. However, an email-delivered American Express bill escaped my notice. I paid the past-due bill online in full, which included a late fee, upon receipt of a bill sent via USPS. No further charges were placed on this card. Today I discovered I was charged an additional $38.00 late fee in - and another $38.00 late fee in -. I feel that American Express is using extreme tactics in charging late fees.