How do I make it stop!

In August of 2004 I received a letter from Merchant's Credit Guide stating their client, Asset Acceptance, stated I owed $4,556.82 and that the original creditor was Citibank. I sent a debt validation letter in response and heard nothing. In February of 2005 I received a letter from Commonwealth Receivables stating I owed $4,187.17 and the creditor was Marine Midland. Again I sent a debt validation letter and heard nothing. In December of 2005 I recceived a letter from Benntt & Deloney stating they represented Asset Acceptance and I owed a debt to Citibank. Another debt validation letter. In February of 2006 another letter from Bennett & Deloney stating they would settle my debt for a discounted amount. Another debt validation letter. Then in June of 2006 I received a letter from Bennett & Deloney supplying me with "documentation" of my debt. The documentation was a photocopy of a sworn statement by an officer of Fourscore Resource Capital. It references THE CREDIT STORE and an Exhibit attached to the affidavit (no exhibit attached) and that the "account" was sold to Asset Acceptance. It is dated Augusut of 2005. I did nothing.

Now I have received a letter from First National Colleciton Bureau stating thie client is Asset Acceptance and I owe a debt (amount again different) and the original creditor is Citibank. There is no Judgement. There is nothing negative on my credit report, In fact my credit rating is excellent. I haven't had deliquent payments on any accounts for about 15 years now.

Any advice?

Thanks,

Lemonfresh