boca_mat is correct. Just stay on track, you are doing exactly what you are supposed to do.
Do not confuse the rules in the Fair Credit Reporting Act with the Fair Debt Collections Practices Act. You have a seperate issue here.
Since it has not been posted to your credit report, the FCRA doesn't even apply yet.
So we look at the FDCPA and we find this:
"If the consumer notifies the debt collector in writing within the thirty-day period described in subsection (a) that the debt, or any portion thereof, is disputed, or that the consumer requests the name and address of the original creditor, the debt collector shall cease collection of the debt, or any disputed portion thereof, until the debt collector obtains verification of the debt or any copy of a judgment, or the name and address of the original creditor, and a copy of such verification or judgment, or name and address of the original creditor, is mailed to the consumer by the debt collector."
What this means is the creditor has been notified that until he verifies the debt, he must cease and desist all collection activities. When were you first contacted by the collection agent, and when did you send them the dispute letter?
Keep a copy of the letter (plus certification it was mailed). If this appears on your credit report, send the credit reporting agency a letter (with a copy of the VOD) and demand that it be removed due to lack of validation. If they fail to remove it, you can sue not only the creditor, but the credit reporting agency also.