Barclays PLC Credit Card Complaint

Barclays PLC Credit card department,

Late fee California

I attempted to pay a closed account through online payment 15 mins before their - ET deadline and could n't get through to their website. At - ET, I was able to login and pay and was still assessed a $37.00 dollar fee. It is the second consecutive month where I was assessed this fee after paying minutes late due to login issues. All correspondence via phone with BarclayCardUS have been hostile saying that there were no issues and that no screenshots that I sent them would be accepted because there are no problems on their end.