Lemorgan write wrong information on my credit score

I bought their products then I gave them my account so they were deducting on my account on time only to find out that my credit score is down just because of them they said I missed payment when I ask them they denied then I decided to pay the full amount to get out from them guess what still today on my credit score their name is red my credit score is down I can’t buy a house just because of their wrong information 💔😭😭😭😭