If you have impossibly high interest on those credit cards, then do cancel them. It doesn’t help to have open credit cards if the interest rate makes it nearly impossible for you to get the balance down. In fact, banks currently have hardship programs, where they will reduce your interest rate TO ZERO if you agree that they will cancel your cards. Yes, you wll take an immediate hit on your credit score, but that will quickly improve as you pay down your credit cards, which you can now do because you don’t have those usurious interest rates to pay.
Assuming you are consistently paying on time (the No. 1 thing you can do to help your credit), take a look at your debt-to-available credit ratio. You want to get that to under 30% (under 10% is even better). Your credit mix is also a factor. If you have the income to make more than minimum payments, though, that is the best way to make an impact. You can read more here:
Write a letter to the specific credit reporting agency that shows the falsehood, whether it is Experian, Equifax, or TransUnion. Explain the mistake and include a copy of the highlighted report along with your documentation. Although certain bureaus now let you submit disputes online, it’s not a bad idea to send this letter by certified mail, and keep a copy for yourself. The reporting agency has 30 days from the receipt of your letter to respond. The Federal Trade Commission provides advice on contacting the credit bureaus about discrepancies. Here are the contact numbers and web sites for the three credit bureaus: