Barclays PLC Credit Card Complaint

Barclays PLC Credit card department,

Billing statement Mississippi

After faithfully paying this card online and getting statements, I logged myself out.I could n't pay I called in -/-/2015 to pay they said they could n't find my account so they told me to wait until they find out.Before the due date on -/-/-, I called on a Thursday 2 days prior, they could n't take payments on the phone and they could n't reactivate online access due to the credit card being close previously. They said to overnight a payment. By now, I had no mail no email statement either. I didnt have assurance that mail will reach them on time. I was told I was getting LATE fees by now. Finally, I got an email payment reminder only on -/-/-. I mailed the money but I did n't have the full statement. They money was cashed by them. I mailed them a letter -/-/- and 10 days ago an attempted was made to speak with them to no success. I have no bill and I had to miss this month payment.