Since the debt is only 2 years old, you need to be prepared to pay the collection even if they don't agree to PFD since the debt is still within the SOL to collect. Sending a PFD is kind of like waking the sleeping monster, so as long as they still have a legal right to collect it's something you'll probably wind up paying whether they agree to delete or not. Even if you can't get them to delete when you pay, you can continue to send GW letters afterwards to try to get it off your reports. I believe this would be your only recourse with the OC as well.