HOYA Lovers

In a recent attempt to apply for a loan, I discovered that my application was denied due to a low credit score, despite my previous score being a solid 792, which had been consistently improving and always brought me good terms for loans. Now, due to some wrong information and some hard inquiries that I didn’t agree to be done, my score dropped. After the denial I asked for a copy of my credit report and I saw some strange information, 2 delinquent accounts and a charge-off. How can I resolve my problem with the mixed credit file and correct all the errors?