Barclays PLC Credit Card Complaint

Barclays PLC Credit card department,

Late fee New York

I got a Mastercard with Barclay Bank, which offers mileage with - -. I misunderstood and believe I was misinformed about the credit card protecting against expiration of miles accumulated. Additionally, for one month I never received a bill and so ultimately paid the bill late. I excluded the penalty fee from my payment. I have tried to cancel the credit card and was told that I could not do this because the bill is not paid. For the past two months I have been charged a penalty because I have not paid anything towards the original penalty and so now as a result of penalties for prior unpaid penalties, the bill is now $100.00. I want to cancel this credit card and believe I should not be held responsible for the penalty. I am shocked that Barclay will not allow me to cancel the card and at least put a hold on further charges. My credit card account number is -. Thanks very much for your help with this complaint.