Their Billing Dispute Department seems designed to frustrate customers. Hold time to reach a representative have exceeded 2 hours, ; form letters state that they are open till 9 pm EST, but if you call after 8 pm EST the voice message is that they close at 8; each time I have talked with a representative a new and different document is requested; documents mailed and faxed to them somehow never arrive there; requests for an email address so that I can scan and email documents are rejected. read full review »