JPMorgan Chase Debt Collection Complaint

JPMorgan Chase Debt collection department,

Cont'd attempts collect debt not owed Debt is not mine Massachusetts

I've asked Chase numerous times to provide proof that this debt belongs to me - as it did and does not. They provided documents from the dealership that did NOT have my signature and where there was a signature it did NOT match that of my own. When I called and wrote to them questioning this, I was given the run around and nothing was done about it - yet it is till on my credit report as a repossession.