Portfolio Validation Response Help

I sent Portfolio a validation request with the usual information requested ie:

What the money you say I owe is for;
Explain and show me how you calculated what you say I owe;
Provide me with copies of any papers that show I agreed to pay what you say I owe;
Provide a verification or copy of any judgment if applicable;
Identify the original creditor;
Prove the Statute of Limitations has not expired on this account
Show me that you are licensed to collect in my state
Provide me with your license numbers and Registered Agent

To which I have received a response letter from them that I do not think validates the required information at all. The meat of the letter says:

Re: Verification Information Concerning PRA Account/Reference No.: xxxxxxxxxxxxxxxx NCO PORTFOLIO MGMT INC.lDISCOVER CARD

The following information is being provided in response to your recent communication concerning the account referenced above. Account Number xxxxxxxxxxxxxxxx and its proceeds were sold, assigned and transferred by the Seller to Portfolio Recovery Associates, LLC on 12/28/2007. At the time of the sale, the Seller provided an electronic file of its business records concerning this account. According to the Seller's records, there was due and payable from xxxxxxx xxxxx to the Seller in the sum of $2591.07 with respect to the account, as of 12/28/2007, there being no known un-credited payments, counterclaims, or offsets against this account at the date of its sale.

Here is a summary of additional information listed in the electronic file for this account:

Account holder's Name Provided By Seller: xxxxxxx xxxx

Account holder's Last 4 Digits of SSN: xxxx

Date Account Opened Provided by Seller: 9/1/1996

Balance at date of PRA purchase: $2591.07

Interest accrued since the date of purchase

or last payment to PRA: $235.54

Costs and Other Fees: $0

*Total Balance Due as of the Date of this Letter: *$2826.61

Please contact us if you would like to receive a payment history of payments that have posted to this account since our company purchased this account.

This is my first time doing something like this but it seems to me that they haven't validated anything other than it's a discover card account from thirteen years ago. There is no mention of this account on my credit reports and I haven't had a discover card in over ten years. Can someone please advise me with what should be the next step. Thank You.