JPMorgan Chase & Co. Credit Card Complaint

JPMorgan Chase & Co. Credit card department,

Late fee

I have two credit cards through Chase. Chase recently redesigned their website and now I am experiencing difficulty in making payments. I was able to schedule a payment for one credit card, but for the other card the website will not let me make any entries for method of payment, date of payment, or payment amount. I have sent several messages to Chase about this problem but each time they respond by saying they appreciate my concern but I am still required to make at least a minimum payment or I will be penalized with a late fee. I have asked them, again, several times how I am supposed to do that since their online payment portal does not work. I am stationed overseas so sending a check ( which I ca n't since I do not have a checkbook here ) by mail will get there very late. I have been a Chase customer for over 15 years and have never missed or been late on a payment.