Barclays PLC Bank Account Or Service Complaint

Barclays PLC Bank account or service department,

Other bank product/service Account opening, closing, or management New York

I went on a cruise in -, 2014. Barclays Bank Delaware was marketing a Carnival Master Card. I applied and was approved. I never used the credit card. After learning there would be a processing fee, I immediately cancelled the card. All purchases incurred on the trip was paid from my debit card on another credit card. After sailing I never used the card and they charged off the account on - -, 2014 and claim that I owe them $430.00. I never used the card and why are they charging me $430.00 for an account which should have a zero balanced.