Product: Credit reporting, credit repair services, or other personal consumer reports

I am writing a complaint against the Experian Credit Bureau and their investigation practices into an incorrectly reported account on my credit report. I originally had a charged off account from XX/XX/XXXX with XXXX XXXX XXXX for {$920.00} after going through some personal financial issues in XXXX. InXX/XX/XXXX, I was able to get back onto my feet pretty well and I was able to pay off a few accounts in full, including the XXXX XXXX XXXX account that was charged off. I paid a total of {$1000.00} to XXXX XXXX, who is now XXXX XXXX. The account was sold to them by XXXX XXXX XXXX after the charge off. After reviewing my credit reports recently for a possible security clearance at my work, I noticed that XXXX XXXX XXXX still reported that the account was charged off with a never paid {$920.00} dollar balance. The current balance reported as {$0.00}, but the account should have stated " charged off/paid in full '' and closed as of XX/XX/XXXX after the paid in full date. I then disputed that account status in the narrative with Experian, so that it would update the closure date to XX/XX/XXXX and it would have a paid in full status on it. This was on XX/XX/XXXX. On XX/XX/XXXX, I received the results of the dispute, and to my amazement the account status was updated to a current charge off as of XX/XX/XXXX, with an unpaid balance. This lowered my credit score by 23 points! I immediately disputed this information once again on XX/XX/XXXX. On XX/XX/XXXX,  I received the results of the second dispute with the same information reporting. This account is currently reporting as an open negative account. This account should have nothing reported afterXX/XX/XXXX. I  immediately called XXXX XXXX XXXX, the company to whom the debt was sold to, and they were immediately able to give me the correct information ( paid off on XX/XX/XXXX for {$1000.00}, a emailed letter stating that it was paid off, etc ). I called Experian by phone to tell them that they are not conducting a full investigation on this, but only calling up the original creditor who was never updated with the balance. Everytime that I have called XXXX XXXX XXXX to ask them why they were reporting to Experian as the account being a current/unpaid charge off, they always tell me that they do not own the account anymore, and that XXXX  is the owner. They then provide me with the phone number for XXXX where I or anybody else can easily obtain the information that it was paid off in full. I do not know how Experian investigates these accounts, but it is definitely not a complete investigation as per the FDCPA. Now that this account continues to report as a current charge off, I may have a possible security clearance hindered because of this. This was also reported shortly after to the XXXX bureau as well as the same status. I just submitted a dispute with updated documents from my bank statements from XXXX, the paid in full letter, and another typed out dispute letter. I have yet to write a complaint on them, as I am waiting to see the final results on their end. My XXXX credit report has yet to be affected by this, but does show that the balance is still {$920.00} owed and never paid, but not a current charge off account. Please find attached the documents that prove I have paid this account in full.Any help is greatly appreciated!