Sales contact at MCI/UUNET?

I realize this is most likely off topic and is likely to get me flamed but I am in desperate need of the contact information for someone in sales or management at MCI/UUNET. We have been paying a reseller for a UUNET circuit for about 6 months and I guess he hasn't been paying MCI/UUNET for this circuit and he's telling us they're about to disconnect circuit and this would be absolutely catastrophic to us right now; so if anyone has the contact information of anyone that would be in a position to assist us in transitioning this circuit or making arrangements to get something done; we would be forever in your gratitude. Thanks, -Drew