You have the right to dispute any information in your credit report that's inaccurate, incomplete, or you believe can't be verified. When you order your credit report, you'll receive instructions on how to dispute credit report information. Credit reports ordered online typically come with instructions for making disputes online, but you can also make disputes over the phone and through the mail.
Credit scoring models usually take into account how much you owe compared to how much credit you have available, called your credit utilization rate or your balance-to-limit ratio. Basically it's the sum of all of your revolving debt (such as your credit card balances) divided by the total credit that is available to you (or the total of all your credit limits).