You could talk to a lawyer, at naca.net who specializes in the
fdcpa and the FCRA. But only if after first contact from the collection agency you requested validation within the first 30 days.
The other thing you can do is what I did. I sent the letter and disputed my credit report after 30 days and it came back verified. 30 days later I disputed it again, same thing. I then waited 5 months disputed the entry and it was removed, and this was one of the worst debt collectors in the industry.
Give it time cause right now a lawsuit against them is pointless, there are not enough violations. Let them really break the law and make it suit worthy. Better yet, if they sue you, counter sue them and it saves you the money to file a suit against them. SAVE YOUR EVIDENCE!!!!!!!!!!