Capital One Credit Card Complaint

Capital One Credit card department,

Identity theft / Fraud / Embezzlement Maine

When I ran my credit report to buy a home I found a credit card from Capital One on my report ..I do n't have nor have I ever had a capital one account..I called Capital One and got the run around being passed from person to person who kept asking for the card number..I do n't have an account how can I have the number..Told them I was calling the fraud department for a fraudulent account they put me in touch with a person named - who said she would call me back in 24 to 48 hours.. never did, than I find out that they closed the investigation and were holding me financially responsible for this account..How can I be held responsible for an account I never opened someone else did and they wo n't return my calls to resolve this matter..It 's - dollars and is wrecking my credit they do n't care..I need help to get this off my credit