Capital One Platinum uses unfair trade practices in dealing with interest rates.  I was at a low 2.3% interest rate and received a notification stating that the interest rate would be increased to 9.9%.  The notification stated that I had the option to cancel the card and keep the low interest rate to pay off the balance or keep the card with the higher interest rate.  The notification stated that I had until 04/17/09 to notify them of my decision.  I called the number in the notification to cancel the card. Capital One was to have cancelled the card effective 05/17/09.  I called Capital One...