It still could take a little time. I started from zero with a touch of bad but mostly no credit. I got a rediculous card at first with high interest and monthly and yearly fees. Soon as my credit built up with some payments, yours isnt terrible, mine was in the 5's, I was able to get a better card. Dont spend much of your available credit. REALLY try and keep it lower than 30% and your uliliztion will look better and help your score rather quickly. im my case opening a new account with a higher ballance and transfering my debt to it (15 months 0% interest but was a 3% fee to do it) saved a lot of money over paying a couple of cards at 20-24% interest. If you have a good utilization % then you might even close the old account but if you are looking at a big purchase soon then it may be better to keep it open. Either way, my closing that horrible card actually made my score rise because of the newer better replacement card showing up. Again mine was in the 5's so it took a bit for new expanded credit acceptance but once it did it is currently going up very quick and am almost 700's. Id plan on a year though if you have negative stuff but you are ahead of me with your starting score already.
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: