For a credit card balance of less than $10,000 to be increasing by hundreds of dollars every day, without you making new charges, just doesn't sound possible to me. Even a 30% interest rate, higher than most APRs, would add roughly $3000 to your balance annually. That would be a bit less than $300 a month in interest charges. So to have your balance increase by hundreds of dollars a day just isn't making any sense. Was this, like, a VISA or Mastercard account? I really think you are misremembering or misunderstanding something.