Portfolio Recovery This company keeps demanding money for a credit card I never had from 1994.They state I owe over 3,000 dollars Norfork, Virginia

The company Portfolio Recovery first conatcted me about 5 months ago, stating that I owed a credit card debt to Capital one from 1994 of over 3,000 dollars and that I needed to find someway to pay this debt. They gave me an address of Woodchuck hill and haven't even lived there since 1994 when my ex hsuband and I were divorced. I asked them to send me something in the mail stating what was owed and they became up set with me and sayed" do you want to pay this bill or not, why are you asking for a statement." I explained to them that I don't recall ever having a capital one card and part of the reason I was divorced was because my exhusband was forging my name on the checking account and writing bad checks. Still this was back in 1994. The cards I did have are paid off and closed. They refused to send my some sort of proof that the bill even existed, and I believe that I never even had this card.They told me to send them a letter stating I never had the card and I did. But they continue to call and ask for money, stating I never sent them a letter. They call almost every day. My boyfriend is getting frustrated with the phone callls and so am I. Today they called and gave me a email address to send them another letter. And this is when I came up with your address. They keep threatening to put this on my credit report. If there was a card it wasn't from me. And why would they wait for almost 17 years to act on it. Can they actually do that?