Hi, I have a vehicle loan from XXXX XXXX XXXX and last year I was late on one payment mostly because I used to pay my vehicle loan bill with my mortgage and I had refinanced my mortgage and I did n't have to pay that month. Unfortunately I totally forgot about my XXXX XXXX XXXX bill. But as soon as I realized that I paid the bill for the last month and the current month. I was n't notified by XXXX and I had paid the bill before I got their call. On call they said that they will be reporting it to Credit agencies as it was past 30 days. I said it 's fine and I assumed that it will probably be a minor hit as it was one missed payment in 3 years since my loan began and probably the only missed payment since I started paying bills. But I had no clue that my credit score will go down from XXXX to XXXX. Next month we decide to buy a new home and applied for the pre approval. I was shocked to find out what my credit score was. Based on the credit score and just one missed payment, I was being offer a much higher loan rate but I was told that it will be fine by the time we purchase the house as it was still XXXX months away. I was also advised to talk to XXXX XXXX XXXX to see if they could resolve it with credit agencies. I called XXXX XXXX XXXX XXXX times and they never resolved it. On my last call with them, they asked me to raise a complaint with all three credit agencies and they said once credit agencies follow up with them, they will resolve the issue. I went to all three credit agencies and opened the dispute. But I have never heard from them and my FICO score as of today stands at XXXX. And this is all because of one missed payment in 10 years. Since then I have paid all my bills on time and it 's been almost 9 months since I missed the payment. But the credit score is where it was. Now it 's time to close my new home and I had to settle on higher interest rate because my FICO score is low i.e. XXXX. This does n't sound right to me.