Need ARIN routing registry help

Level3 won't let us advertise our netblock because RADB shows it owned by Telkom South Africa, but it's clearly assigned to us by ARIN. I've raised a question with ARIN, could really use someone there that could expedite. On that note, when ARIN re-assigns networks, shouldn't they clear out related entries in the routing registry? --- Please refer to http://www.amherst.com/amherst-email-disclaimer/ for important disclosures regarding this electronic communication.