Around XXXX I submitted a complaint about a debt collector ( XXXX XXXX ) that resulted in a removal of the debt from my credit report due to their failure to send notice as well as their failure to validate that I owed it. 
Since then, the debt was sold to a company named Senex Services Corp. This collection agency also reported the same account as a legitimate debt to the credit bureau without sending me notice. I contacted the company and requested validation and they have not provided it and will not remove the information from my credit report. They reported it in XXXX. Thank you.