Hi Atryxia, did you make sure that you were out of SOL before sending the DV? They can bring the report date more current yes.
They have 30 days to validate (plus some mail time, so give it 35 days). If they don't validate in that time period, then they can no longer report. I would then dispute with the CRAs, sending a copy of the DV, GC, and CM receipt. You did send it CMRRR, without signing it didn't you? How long ago was it sent?