Edgars/RCS not closing my account with credit bureau and tanking my credit score

In December I closed my Edgars/RCS account due to the fact that I was being charged a account fee even though I had a zero balance. They told me that the account will be closed and the fees reversed. But they haven't closed it with the credit bureau and now after 90 days it has been listed as a missed payment. This has resulted in my credit score dropping by 20 points. I phoned yesterday to try to sort this out and was told that someone with the authority to fix it would phone me back. SHOCKER no one contacted me. I am working hard to improve my score with the goal of buying a house in a couple of months. They are literally messing with my life!!! Do the RIGHT thing and stop messing with people's lives.