Problem with a company's investigation into an existing problem: Credit reporting or other personal consumer reports

I filed a dispute for incorrect information on my credit report. I received an email from the credit bureau stating that they are assuming the disputes are coming from a 3rd party. They in fact did not come from a 3rd party. l even called them to verify it was me and they still refused to process my disputes. I wasted money on mailing my disputes out. I sent personal information to verify my identity through mail, just for them to not thoroughly investigate.