Submitted settlement letters and they don’t remove notification off your credit report

Capfin handed over my account to DMC, that’s fine. I settle the account with DMC, they have they update my account immediately and remove the notification off my credit report. Then I contact Capfin and even send countless emails detailing that I have settled the account and even send them the proof of payment as well as the settlement letter from DMC. You have a nerve to send an email saying that I must email DMC when it’s not their name on their but yours. They even advised that I must contact Capfin to remove the account off my report. Let it be known this company wants to tarnish your credit record and they don’t remove their account to make you look pathetic. I AM ASKING FOR THE VERY LAST TIME TO REMOVE YOUR ACCOUNT AS I DO NOT OWE YOU PEOPLE A DIME!