Not the response I expected from a PFD

[Anonymous]

I sent a PFD letter to a CA offering to pay the amount in full.  I used the template that I found on this forum.  I received a response within the 15 days, but it basically ignored my letter.  Instead of agreeing or disagreeing to the terms of the PFD letter, they sent a letter letting me know that they purchased the original account and the total amount owed--also that I had 30 days to dispute the validity of the debt.  I don't dispute it.  I know it's mine. 

Should I send the PFD letter again? 

[Anonymous]

What I did on one on mine who didn't reply to my PFD was I sent a DV after the 15 day period like I said I would in the PFD and sent a copy of my PFD and offered to extend my offer until XXXXXX.

The debt was only $29 i wasn't worried about validation, just getting it off my reports. Still no response, but it is off my reports.