Took or threatened to take negative or legal action: Debt collection

The company began collection activity and reporting a debt that I dispute. I contacted the company requesting validation of the debt, including proof that I am responsible for the account, a full itemized breakdown of the balance, and documentation showing the original creditor and full chain of ownership. Despite my request, I did not receive adequate validation or supporting documentation. Instead, the company continued collection activity and/or credit reporting without resolving the dispute. I requested that the account be verified or removed until proper validation could be provided, but the issue remains unresolved. I am seeking full validation of the debt or removal of the account from my credit report if proper documentation can not be provided.